Expand the power of user filtering

Summary:
Ref T8387. This mostly merges D10565 + D10480. I'm going to touch this to add mailing list stuff shortly so I wanted to clean those up.

This isn't super pretty but is fully flexible and consistent with other modern query UIs.

This should be more-or-less backward compatible.

Test Plan: Fiddled with the new options.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: eadler, cburroughs, epriestley

Maniphest Tasks: T8044, T8387

Differential Revision: https://secure.phabricator.com/D13122