Sankore 831 - delete annotations on the scene

src/domain/UBGraphicsScene.cpp

@@ -1270,7 +1270,7 @@ void UBGraphicsScene::clearAnnotations()
     while (itItems.hasNext())
     {
         QGraphicsItem* item = itItems.next();
-        UBGraphicsPolygonItem* pi = qgraphicsitem_cast<UBGraphicsPolygonItem*>(item);
+        UBGraphicsStrokesGroup* pi = qgraphicsitem_cast<UBGraphicsStrokesGroup*>(item);
         if (pi)
         {
             removeItem(item);