AbstractCongtentSubApp.updateActionbar is not called when a list/tree/thumbnail item is deleted. Ideally, this method should be called ANY TIME the selection in the views changes.

This causes a problem specifically in Assets app.
Generally, when no item is selected, then the updateActionbar will configure the actionbar to show the appropriate actions.
If I select a folder, then I correctly get actions to "Rename folder" and "Delete folder".
But if I then delete the folder, then no items will be selected any more, and therefore the actionBar should update to not give me the "Rename folder" and "Delete folder" options. But currently these options remain available.