Differential - make diffs you authored + are reviewer for show up in appropos boxes

Summary: Fixes T2328. Note the audit part is fixed now.

Test Plan: Tried to reproduce the audit issue by raising my own commit as a problem; it showed up before code changes! Made a diff with my self as author and reviewer; it showed up as expected

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T2328

Differential Revision: https://secure.phabricator.com/D8755