Instance view: is not cleared if last cloud is removed

1) make sure you have only 1 cloud 2) make sure you have instance view opened & visible 3) select your cloud in the cloud view: instance shows the instances of this cloud 4) choose "DIsconnect cloud" in the context menu in the cloud view Result: Combobox in Instance view gets cleared (no items left) and disabled, but it still shows the instances of the cloud you just deleted. Expected result: The combobox in the instance view gets cleared and disabled, table viewer is cleared, too (shows no instances any more)