diff --git a/resources/forms/preferences.ui b/resources/forms/preferences.ui
index 7c3900eb..d2669e8d 100644
--- a/resources/forms/preferences.ui
+++ b/resources/forms/preferences.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>759</width>
+    <width>800</width>
     <height>718</height>
    </rect>
   </property>
@@ -557,275 +557,259 @@
        <property name="frameShadow">
         <enum>QFrame::Raised</enum>
        </property>
-       <widget class="QFrame" name="frame_2">
+       <widget class="QFrame" name="darkBackgroundOpacityFrame">
         <property name="geometry">
          <rect>
           <x>0</x>
-          <y>0</y>
+          <y>90</y>
           <width>741</width>
-          <height>611</height>
+          <height>52</height>
          </rect>
         </property>
         <property name="frameShape">
-         <enum>QFrame::StyledPanel</enum>
+         <enum>QFrame::NoFrame</enum>
         </property>
         <property name="frameShadow">
          <enum>QFrame::Raised</enum>
         </property>
-        <widget class="QFrame" name="crossColorDarkBackgroundFrame">
-         <property name="geometry">
-          <rect>
-           <x>250</x>
-           <y>30</y>
-           <width>241</width>
-           <height>50</height>
-          </rect>
-         </property>
-         <property name="frameShape">
-          <enum>QFrame::NoFrame</enum>
-         </property>
-         <property name="frameShadow">
-          <enum>QFrame::Raised</enum>
-         </property>
-         <layout class="QHBoxLayout" name="crossColorDarkBackgroundLayout">
-          <item>
-           <widget class="QLabel" name="crossColorDarkBackgroundLabel">
-            <property name="text">
-             <string>On Dark Background</string>
-            </property>
-           </widget>
-          </item>
-          <item>
-           <spacer name="horizontalSpacer_8">
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
-            </property>
-            <property name="sizeHint" stdset="0">
-             <size>
-              <width>40</width>
-              <height>20</height>
-             </size>
-            </property>
-           </spacer>
-          </item>
-          <item>
-           <widget class="UBColorPicker" name="crossColorDarkBackgroundColorPicker">
-            <property name="minimumSize">
-             <size>
-              <width>32</width>
-              <height>32</height>
-             </size>
-            </property>
-            <property name="frameShape">
-             <enum>QFrame::StyledPanel</enum>
-            </property>
-            <property name="frameShadow">
-             <enum>QFrame::Raised</enum>
-            </property>
-           </widget>
-          </item>
-         </layout>
-        </widget>
-        <widget class="QFrame" name="darkBackgroundOpacityFrame">
-         <property name="geometry">
-          <rect>
-           <x>0</x>
-           <y>90</y>
-           <width>741</width>
-           <height>52</height>
-          </rect>
-         </property>
-         <property name="frameShape">
-          <enum>QFrame::NoFrame</enum>
-         </property>
-         <property name="frameShadow">
-          <enum>QFrame::Raised</enum>
-         </property>
-         <layout class="QHBoxLayout" name="horizontalLayout_8">
-          <item>
-           <spacer name="wSpacer_2">
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
-            </property>
-            <property name="sizeHint" stdset="0">
-             <size>
-              <width>154</width>
-              <height>20</height>
-             </size>
-            </property>
-           </spacer>
-          </item>
-          <item>
-           <widget class="QLabel" name="darkBackgroundOpacityLabel">
-            <property name="text">
-             <string>Opacity</string>
-            </property>
-           </widget>
-          </item>
-          <item>
-           <widget class="QSlider" name="darkBackgroundOpacitySlider">
-            <property name="minimum">
-             <number>20</number>
-            </property>
-            <property name="maximum">
-             <number>100</number>
-            </property>
-            <property name="value">
-             <number>50</number>
-            </property>
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
-            </property>
-            <property name="tickPosition">
-             <enum>QSlider::TicksAbove</enum>
-            </property>
-            <property name="tickInterval">
-             <number>20</number>
-            </property>
-           </widget>
-          </item>
-          <item>
-           <spacer name="eSpacer_2">
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
-            </property>
-            <property name="sizeHint" stdset="0">
-             <size>
-              <width>156</width>
-              <height>20</height>
-             </size>
-            </property>
-           </spacer>
-          </item>
-         </layout>
-        </widget>
-        <widget class="QFrame" name="crossColorLightBackgroundFrame">
-         <property name="geometry">
-          <rect>
-           <x>250</x>
-           <y>150</y>
-           <width>241</width>
-           <height>51</height>
-          </rect>
-         </property>
-         <property name="frameShape">
-          <enum>QFrame::NoFrame</enum>
-         </property>
-         <property name="frameShadow">
-          <enum>QFrame::Raised</enum>
-         </property>
-         <layout class="QHBoxLayout" name="crossColorLightBackgroundLayout">
-          <item>
-           <widget class="QLabel" name="crossColorLightBackgroundLabel">
-            <property name="text">
-             <string>On Light Background</string>
-            </property>
-           </widget>
-          </item>
-          <item>
-           <spacer name="horizontalSpacer_7">
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
-            </property>
-            <property name="sizeHint" stdset="0">
-             <size>
-              <width>40</width>
-              <height>20</height>
-             </size>
-            </property>
-           </spacer>
-          </item>
-          <item>
-           <widget class="UBColorPicker" name="crossColorLightBackgroundColorPicker">
-            <property name="minimumSize">
-             <size>
-              <width>32</width>
-              <height>32</height>
-             </size>
-            </property>
-            <property name="frameShape">
-             <enum>QFrame::StyledPanel</enum>
-            </property>
-            <property name="frameShadow">
-             <enum>QFrame::Raised</enum>
-            </property>
-           </widget>
-          </item>
-         </layout>
-        </widget>
-        <widget class="QFrame" name="lightBackgroundOpacityFrame">
-         <property name="geometry">
-          <rect>
-           <x>0</x>
-           <y>210</y>
-           <width>741</width>
-           <height>52</height>
-          </rect>
-         </property>
-         <property name="frameShape">
-          <enum>QFrame::NoFrame</enum>
-         </property>
-         <property name="frameShadow">
-          <enum>QFrame::Raised</enum>
-         </property>
-         <layout class="QHBoxLayout" name="horizontalLayout_10">
-          <item>
-           <spacer name="wSpacer_3">
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
-            </property>
-            <property name="sizeHint" stdset="0">
-             <size>
-              <width>154</width>
-              <height>20</height>
-             </size>
-            </property>
-           </spacer>
-          </item>
-          <item>
-           <widget class="QLabel" name="lightBackgroundOpacityLabel">
-            <property name="text">
-             <string>Opacity</string>
-            </property>
-           </widget>
-          </item>
-          <item>
-           <widget class="QSlider" name="lightBackgroundOpacitySlider">
-            <property name="minimum">
-             <number>20</number>
-            </property>
-            <property name="maximum">
-             <number>100</number>
-            </property>
-            <property name="value">
-             <number>50</number>
-            </property>
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
-            </property>
-            <property name="tickPosition">
-             <enum>QSlider::TicksAbove</enum>
-            </property>
-            <property name="tickInterval">
-             <number>20</number>
-            </property>
-           </widget>
-          </item>
-          <item>
-           <spacer name="eSpacer_3">
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
-            </property>
-            <property name="sizeHint" stdset="0">
-             <size>
-              <width>156</width>
-              <height>20</height>
-             </size>
-            </property>
-           </spacer>
-          </item>
-         </layout>
-        </widget>
+        <layout class="QHBoxLayout" name="horizontalLayout_8">
+         <item>
+          <spacer name="wSpacer_2">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>154</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+         <item>
+          <widget class="QLabel" name="darkBackgroundOpacityLabel">
+           <property name="text">
+            <string>Opacity</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QSlider" name="darkBackgroundOpacitySlider">
+           <property name="minimum">
+            <number>20</number>
+           </property>
+           <property name="maximum">
+            <number>100</number>
+           </property>
+           <property name="value">
+            <number>50</number>
+           </property>
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="tickPosition">
+            <enum>QSlider::TicksAbove</enum>
+           </property>
+           <property name="tickInterval">
+            <number>20</number>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="eSpacer_2">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>156</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+        </layout>
+       </widget>
+       <widget class="QFrame" name="crossColorDarkBackgroundFrame">
+        <property name="geometry">
+         <rect>
+          <x>250</x>
+          <y>30</y>
+          <width>241</width>
+          <height>50</height>
+         </rect>
+        </property>
+        <property name="frameShape">
+         <enum>QFrame::NoFrame</enum>
+        </property>
+        <property name="frameShadow">
+         <enum>QFrame::Raised</enum>
+        </property>
+        <layout class="QHBoxLayout" name="crossColorDarkBackgroundLayout">
+         <item>
+          <widget class="QLabel" name="crossColorDarkBackgroundLabel">
+           <property name="text">
+            <string>On Dark Background</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="horizontalSpacer_8">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+         <item>
+          <widget class="UBColorPicker" name="crossColorDarkBackgroundColorPicker">
+           <property name="minimumSize">
+            <size>
+             <width>32</width>
+             <height>32</height>
+            </size>
+           </property>
+           <property name="frameShape">
+            <enum>QFrame::StyledPanel</enum>
+           </property>
+           <property name="frameShadow">
+            <enum>QFrame::Raised</enum>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </widget>
+       <widget class="QFrame" name="lightBackgroundOpacityFrame">
+        <property name="geometry">
+         <rect>
+          <x>0</x>
+          <y>210</y>
+          <width>741</width>
+          <height>52</height>
+         </rect>
+        </property>
+        <property name="frameShape">
+         <enum>QFrame::NoFrame</enum>
+        </property>
+        <property name="frameShadow">
+         <enum>QFrame::Raised</enum>
+        </property>
+        <layout class="QHBoxLayout" name="horizontalLayout_10">
+         <item>
+          <spacer name="wSpacer_3">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>154</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+         <item>
+          <widget class="QLabel" name="lightBackgroundOpacityLabel">
+           <property name="text">
+            <string>Opacity</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QSlider" name="lightBackgroundOpacitySlider">
+           <property name="minimum">
+            <number>20</number>
+           </property>
+           <property name="maximum">
+            <number>100</number>
+           </property>
+           <property name="value">
+            <number>50</number>
+           </property>
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="tickPosition">
+            <enum>QSlider::TicksAbove</enum>
+           </property>
+           <property name="tickInterval">
+            <number>20</number>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="eSpacer_3">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>156</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+        </layout>
+       </widget>
+       <widget class="QFrame" name="crossColorLightBackgroundFrame">
+        <property name="geometry">
+         <rect>
+          <x>250</x>
+          <y>150</y>
+          <width>241</width>
+          <height>51</height>
+         </rect>
+        </property>
+        <property name="frameShape">
+         <enum>QFrame::NoFrame</enum>
+        </property>
+        <property name="frameShadow">
+         <enum>QFrame::Raised</enum>
+        </property>
+        <layout class="QHBoxLayout" name="crossColorLightBackgroundLayout">
+         <item>
+          <widget class="QLabel" name="crossColorLightBackgroundLabel">
+           <property name="text">
+            <string>On Light Background</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="horizontalSpacer_7">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+         <item>
+          <widget class="UBColorPicker" name="crossColorLightBackgroundColorPicker">
+           <property name="minimumSize">
+            <size>
+             <width>32</width>
+             <height>32</height>
+            </size>
+           </property>
+           <property name="frameShape">
+            <enum>QFrame::StyledPanel</enum>
+           </property>
+           <property name="frameShadow">
+            <enum>QFrame::Raised</enum>
+           </property>
+          </widget>
+         </item>
+        </layout>
        </widget>
       </widget>
      </widget>
@@ -3009,7 +2993,7 @@ Public License instead of this License.  But first, please read
           <string notr="true">&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
 &lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
 p, li { white-space: pre-wrap; }
-&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'Ubuntu'; font-size:11pt; font-weight:400; font-style:normal;&quot;&gt;
+&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'MS Shell Dlg 2'; font-size:7.8pt; font-weight:400; font-style:normal;&quot;&gt;
 &lt;p style=&quot; margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:12pt; font-weight:600;&quot;&gt;Translations&lt;/span&gt;&lt;/p&gt;
 &lt;p style=&quot; margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:10pt;&quot;&gt;&lt;br /&gt;&lt;/span&gt;&lt;/p&gt;
 &lt;p style=&quot; margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:10pt;&quot;&gt;A special thanks to:&lt;/span&gt;&lt;/p&gt;
@@ -3103,7 +3087,7 @@ p, li { white-space: pre-wrap; }
           <string notr="true">&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
 &lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
 p, li { white-space: pre-wrap; }
-&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'Ubuntu'; font-size:11pt; font-weight:400; font-style:normal;&quot;&gt;
+&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'MS Shell Dlg 2'; font-size:7.8pt; font-weight:400; font-style:normal;&quot;&gt;
 &lt;table border=&quot;0&quot; style=&quot;-qt-table-type: root; margin-top:4px; margin-bottom:4px; margin-left:4px; margin-right:4px;&quot;&gt;
 &lt;tr&gt;
 &lt;td style=&quot;border: none;&quot;&gt;
@@ -3122,9 +3106,9 @@ p, li { white-space: pre-wrap; }
 &lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:10pt;&quot;&gt;Case Postale 241&lt;/span&gt;&lt;/p&gt;
 &lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:10pt;&quot;&gt;1211 Genève 8&lt;/span&gt;&lt;/p&gt;
 &lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:10pt;&quot;&gt;Switzerland&lt;/span&gt;&lt;/p&gt;
-&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;a href=&quot;http://www.openboard.ch&quot;&gt;&lt;span style=&quot; font-family:'.Helvetica Neue DeskInterface'; text-decoration: underline; color:#0000ff;&quot;&gt;openboard.ch&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;
-&lt;p style=&quot;-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'.Helvetica Neue DeskInterface'; text-decoration: underline; color:#0000ff;&quot;&gt;&lt;br /&gt;&lt;/p&gt;
-&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:10pt;&quot;&gt;emails: &lt;/span&gt;&lt;a href=&quot;mailto:sem.logistique@edu.ge.ch&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:10pt; text-decoration: underline; color:#0000ff;&quot;&gt;sem.logistique@edu.ge.ch&lt;/span&gt;&lt;/a&gt;, &lt;a href=&quot;mailto:sem.logistique@edu.ge.ch&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:10pt; text-decoration: underline; color:#0000ff;&quot;&gt;support@openboard.ch&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/body&gt;&lt;/html&gt;</string>
+&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;a href=&quot;http://www.openboard.ch&quot;&gt;&lt;span style=&quot; font-family:'.Helvetica Neue DeskInterface'; font-size:11pt; text-decoration: underline; color:#0000ff;&quot;&gt;openboard.ch&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;
+&lt;p style=&quot;-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'.Helvetica Neue DeskInterface'; font-size:11pt; text-decoration: underline; color:#0000ff;&quot;&gt;&lt;br /&gt;&lt;/p&gt;
+&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:10pt;&quot;&gt;emails: &lt;/span&gt;&lt;a href=&quot;mailto:sem.logistique@edu.ge.ch&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:10pt; text-decoration: underline; color:#0000ff;&quot;&gt;sem.logistique@edu.ge.ch&lt;/span&gt;&lt;/a&gt;&lt;span style=&quot; font-family:'Ubuntu'; font-size:11pt;&quot;&gt;, &lt;/span&gt;&lt;a href=&quot;mailto:sem.logistique@edu.ge.ch&quot;&gt;&lt;span style=&quot; font-family:'Cantarell'; font-size:10pt; text-decoration: underline; color:#0000ff;&quot;&gt;support@openboard.ch&lt;/span&gt;&lt;/a&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/body&gt;&lt;/html&gt;</string>
          </property>
          <property name="openExternalLinks">
           <bool>true</bool>