Separate usergroup's user data

[mediafinger]

When being in the admin interface, only data from one usergroup should be visible. At the moment all data is scoped, but user data (Authorizations, Users, Likes, Participations) is global.

I didn't look at the code yet, to check how easy this would be achievable. But a whole separation would be preferable and enable other features (like messaging all users of one usergroup).

[phoet]

I think that a good approach would be to split the "admin" part from the "community" part. Admin has all the access, community has only community access. This could be quite simple ie through different admin mounts.

[mediafinger]

Yes, that is a good idea. Maybe better a part of #623

[phoet]

Did not see the other issue, but yes, it's basically the same