R1:4c57f8aaf1db

Modernized Phriction's Diff Controller

Summary:
Refs T2686

- Added additional crumb to link back to History view
- Revert buttons hidden for Stub and Move changes, too
- added colors to the change set to reflect the colors in the diff

Test Plan: looked at various changes, verified correct appearance

Reviewers: epriestley, chad, btrahan

CC: aran, Korvin

Maniphest Tasks: T2686

Differential Revision: https://secure.phabricator.com/D5401