Old Event Listener Realized as Wiki Component Left Over When Renaming Listener

See https://forum.xwiki.org/t/questions-problems-with-event-listener/13819?u=gohrner for original description.

Renaming a Listener realised as a Wiki Component really seems to lead to trouble.

We installed Event Listener Administration in which one can see that there’s only one Listener after an Xwiki restart, but after renaming the Listener, we get two active Listeners - the old one under the old name, and the Listener with the new name.

Using the Event Listener Administration the old one can be disabled, but in my opinion the old implementation should not exist any more at all in the first place. Otherwise, it cannot be managed any more through the Wiki Component page which originally defined / created it.