Feature: Delete ("read") Notifications

Hello Devs,

I'm the type that likes to keep my notifications clean. So I was wondering, if you could add a button to the notifications to clear the list. Maybe one on the notification itself and/or one that can clear all the "read" ones. That way, the notification list can have only "new" notifications or is clear. But I don't want the "read" notfications to automaticly be deleted.

I think this would be agreat additiion, to keep only the notifications ("new", as well as selected "read") in the notification list.

Thanks for the good work!