Resolve "Get groups right"
TODO:
-
Remove "HeliportGroup" model -
Rename "Group" model to "HeliportGroup" -
Make "HeliportGroup" an extension of auth groups, following the Django docs -
Check "LdapUserInformationManger" for correctness -
In the UI, change labels referring to "Department(s)" to "Group(s)" -
Make sure that ownership and co-ownership of digital objects stays intact
Closes #693 (closed)