R1:cf35a640ecb7

Enable filtering for committed revisions

Summary:
engineers requested to supporting filtering by 'committed'
revisions, and I think it makes sense.

Test Plan: verified that all the three options worked

Reviewers: epriestley, btrahan, nh

Reviewed By: nh

CC: nh, wolffiex, aran

Differential Revision: https://secure.phabricator.com/D1383