Add UI elements for admins and make LDAP backend to reflect group suspended state
Well, It was groups before and it is internally 'groups' still. I hesitate to change everything to distlists now. It is 'distlist' in the UI, though.
So, we can change everything to 'distlist' later, but I'm not sure that was Jeroen's intention. I remember it was his decission to make it 'groups' (and I asked that it might not be the best name then) when it was implemented in the first place. It looks that he changed his mind, but I don't know if it includes internals.
One probem I see is existence of both App\Handlers\Group and App\Handlers\Distlist (see D2500) but this can be resolved by renaming the later to AllowDistlist or sth like that.
So, @vanmeeuwen should I rename everything to distlist including the DB table name? Anyway, I think this can be done after merging these diffs.