User filter lists

[qdacsvx]

These lists can get long. It's hard to find things without any sorting.

There should be separate filter lists by status: promoted, demoted, plonked.

Each list should be sorted e.g. by username.

This way users can easily manage their groups, and easily find individuals.

[qdacsvx]

There could be links to sort different ways: by status, by username.