added possibility to start in Document Mode

resources/forms/preferences.ui

@@ -82,7 +82,7 @@
    <item row="1" column="0">
     <widget class="QTabWidget" name="mainTabWidget">
      <property name="currentIndex">
-      <number>7</number>
+      <number>0</number>
      </property>
      <widget class="QWidget" name="displayTab">
       <attribute name="title">
@@ -387,6 +387,11 @@
                 <string>Desktop</string>
                </property>
               </item>
+              <item>
+               <property name="text">
+                <string>Document</string>
+               </property>
+              </item>
              </widget>
             </item>
             <item row="0" column="2">

src/core/UBApplication.cpp

@@ -351,10 +351,12 @@ int UBApplication::exec(const QString& pFileToImport)
     if (pFileToImport.length() > 0)
         UBApplication::applicationController->importFile(pFileToImport);
 
-    if (UBSettings::settings()->appStartMode->get().toInt())
-        applicationController->showDesktop();
-    else
+    if (UBSettings::settings()->appStartMode->get().toInt() == 0)
         applicationController->showBoard();
+    else if (UBSettings::settings()->appStartMode->get().toInt() == 1)
+        applicationController->showDesktop();
+    else if (UBSettings::settings()->appStartMode->get().toInt() == 2)
+        applicationController->showDocument();
 
     emit UBDrawingController::drawingController()->colorPaletteChanged();