Fixed saving of all graphicsItems' zValues

Simply added copying of zValue to the deep copy functions. As tested on
OSX, this does pose any problems when duplicating an item on-page (i.e
generating a new item with a zValue equal to its original).

src/domain/UBGraphicsMediaItem.cpp

@@ -275,6 +275,8 @@ void UBGraphicsMediaItem::copyItemParameters(UBItem *copy) const
         cp->setSourceUrl(this->sourceUrl());
         cp->resize(this->size());
 
+        cp->setZValue(this->zValue());
+
         connect(UBApplication::boardController, SIGNAL(activeSceneChanged()), cp, SLOT(activeSceneChanged()));
         // TODO UB 4.7 complete all members
     }

src/domain/UBGraphicsPDFItem.cpp

@@ -122,6 +122,7 @@ void UBGraphicsPDFItem::copyItemParameters(UBItem *copy) const
         cp->setFlag(QGraphicsItem::ItemIsSelectable, true);
         cp->setData(UBGraphicsItemData::ItemLayerType, this->data(UBGraphicsItemData::ItemLayerType));
         cp->setSourceUrl(this->sourceUrl());
+        cp->setZValue(this->zValue());
     }
 }
 

src/domain/UBGraphicsPixmapItem.cpp

@@ -156,6 +156,8 @@ void UBGraphicsPixmapItem::copyItemParameters(UBItem *copy) const
         cp->setData(UBGraphicsItemData::ItemLayerType, this->data(UBGraphicsItemData::ItemLayerType));
         cp->setData(UBGraphicsItemData::ItemLocked, this->data(UBGraphicsItemData::ItemLocked));
         cp->setSourceUrl(this->sourceUrl());
+
+        cp->setZValue(this->zValue());
     }
 }
 

src/domain/UBGraphicsSvgItem.cpp

@@ -180,6 +180,7 @@ void UBGraphicsSvgItem::copyItemParameters(UBItem *copy) const
         cp->setData(UBGraphicsItemData::ItemLayerType, this->data(UBGraphicsItemData::ItemLayerType));
         cp->setData(UBGraphicsItemData::ItemLocked, this->data(UBGraphicsItemData::ItemLocked));
         cp->setSourceUrl(this->sourceUrl());
+        cp->setZValue(this->zValue());
     }
 }
 

src/domain/UBGraphicsTextItem.cpp

@@ -280,6 +280,7 @@ void UBGraphicsTextItem::copyItemParameters(UBItem *copy) const
         cp->setTextHeight(this->textHeight());
 
         cp->setSourceUrl(this->sourceUrl());
+        cp->setZValue(this->zValue());
     }
 }
 

src/domain/UBGraphicsWidgetItem.cpp

@@ -744,6 +744,7 @@ void UBGraphicsAppleWidgetItem::copyItemParameters(UBItem *copy) const
         }
 
         cp->setSourceUrl(this->sourceUrl());
+        cp->setZValue(this->zValue());
     }
 
 }