Allow users to drag-reorder action bar (#32552)

* Avoid rebuilding all buttons on action state change

Allows for drag events to continue when actions change

* Remove excess action buttons

---------

Co-authored-by: Eoin Mcloughlin <helloworld@eoinrul.es>

Content.Client/UserInterface/Systems/Actions/ActionUIController.cs

@@ -398,10 +398,6 @@ public sealed class ActionUIController : UIController, IOnStateChanged<GameplayS
     {
         QueueWindowUpdate();
 
-        // TODO ACTIONS allow buttons to persist across state applications
-        // Then we don't have to interrupt drags any time the buttons get rebuilt.
-        _menuDragHelper.EndDrag();
-
         if (_actionsSystem != null)
             _container?.SetActionData(_actionsSystem, _actions.ToArray());
     }