Currently delegates do not get deleted when removed from models. Due to
the complexity of drag state and other objects, we can't simply delete
the delegate when removed from the model because they might still be
involved in animations or other state at the time of removal. Use smart
pointers to have the delegate objects deleted instead.
QML unfortunately doesn't support QSharedPointer, so we need to expose raw pointers to it.
Fix the favourites bar reordering when it is already full, currently it
prevents any changes on a full bar, requiring users to move the delegate
out and back in again.
This fixes in issue where the favorites bar icons would previously animate based off of position changes. This was causing unwanted animations in situations like screen rotation and login.
