homescreens/folio: Fix favourites bar ghost position when drag out

Fix the scenario where the favourites bar ghost position is not removed
when the user drags the delegate out of the bar area.

containments/homescreens/folio/dragstate.cpp

@@ -238,6 +238,9 @@ void DragState::onDelegateDragPositionChanged()
     // stop the favourites insertion timer if the delegate has moved out
     if (!inFavouritesArea) {
         m_favouritesInsertBetweenTimer->stop();
+
+        // clear any ghost entries in the favourites model
+        m_homeScreen->favouritesModel()->deleteGhostEntry();
     }
 
     if (inFavouritesArea || inFolder) {