R1:a185b1b4a73e

Include comment drafts in revision draft query

Summary: Previously, only inline comment drafts were included.

Test Plan:
**/differential/** - verified that there are drafts where they weren't before.

Checked executed queries.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3615