Ref T10978. I'm inching toward cleaning up our audit state. Two issues are:
- Authored commits show up in "Ready to Audit", but should not.
- Unreachable commits (like that stacked of unsquashed stuff) show up too, but we don't really care about them.
Kick authored stuff out of the "Ready to Audit" bucket and hide unreachable commits by default, with constraints for filtering. Also give them a closed/disabled/strikethru style.