Removal of Tabs from the Main Page if based on a deleted base element

[dev-victoria]

Checklist

• [x] I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• [x] I have read the FAQ and my problem isn't listed.
• [x] I'm aware that this is a request for NewPipe itself and that requests for adding a new service need to be made at NewPipeExtractor.
• [x] I have taken the time to fill in all the required details. I understand that the feature request will be dismissed otherwise.
• [x] This issue contains only one feature request.
• [x] I have read and understood the contribution guidelines.

Feature description

Currently one is able to delete a Playlist or Channel Group, while it is represented on the main page. This leads to an empty abandoned Tab on the main page. Currently I have not detected an error from this situation. It feels a little unclean tho.

I suggest to either:

• automatically remove the tab from the current main page and the settings on deletion.
• prevent the user from deleting, prompting to remove the Tab first.

In both cases it would be necessary to check whether a tab of the current element to delete exists. I think just preventing would be easier to code, but that depends on what is being done with #7578

This would also be a topic, if implemented, for deletion from #2088

Why do you want this feature?

I have no use for left over tabs in the main page. I think the suggested behavior is reasonable and could prevent confusion for the user.

Additional information

Current Situation - Tabs of deleted Elements

Channel Group: Playlist: