Group page does not distinguish active and alumni members

[MichaelRoeder]

Problem

Go to the groups page and check the members and projects of the single groups. There are active and alumni members.

Expected behavior

There should be additional columns / areas for alumni members and projects for the groups.

Suggested Implementation

We have the data and code to distinguish the roles of persons (see the implementation of the teams page). What we need is a filter in the generation of the group content separating persons with the alumni role from the others.

The same can be applied for projects, where we can distinguish active projects (e.g., NEBULA) and alumni projects (e.g., FROCKG).