Fix to SANKORE-629.

D'n'D in widgets works fine now.

src/domain/UBGraphicsItemDelegate.cpp

@@ -227,7 +227,7 @@ bool UBGraphicsItemDelegate::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
         return true;
     }
     else
-        return true;
+        return false;
 }
 
 bool UBGraphicsItemDelegate::weelEvent(QGraphicsSceneWheelEvent *event)