Summary:
Ref T4100.
This makes it slightly harder to choose, say, all priorities above X or all priorities except Y. We could add `open()`, `closed()`, `min()`, `max()`, and `not()` functions if there's a meaningful demand for them. I suspect some of these are maybe worthwhile while others aren't as worthwhile.
Test Plan: {F380058}
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T4100
Differential Revision: https://secure.phabricator.com/D12528
f69f53124c