Summary:
Ref T4119. This is ugly for now, but technically works.
The comment area and transaction log don't realy know about each other, so for the moment the linking is a bit manual. Differential/Maniphest are special cases anyway.
Test Plan: {F149992}
Reviewers: chad, btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T4119
Differential Revision: https://secure.phabricator.com/D8957
