Redesign Comment Box
Summary: Redesign the action comment box for better use in two column, mobile, nuance.
Test Plan: Test in mobile / desktop / tablet, adding and removing actions. Actionless comment boxes, etc.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: cspeckmim, Korvin
Differential Revision: https://secure.phabricator.com/D16811