Given that there is basic CentralNotice/Translate integration (bug 36591), when a banner with a message group is only associated with one or more campaigns that have ended, one of two things should be done for these message groups:
- They should be deregistered with Translate
- They should be marked as discouraged in Translate
Alternatively, this could be done a third way:
- bug 37141 makes it possible to register a message group with Translate. A second button could be added to deregister with Translate or discourage a message group in Translate.