Modernize "revision update history" in Differential

Summary:
Ref T4585.

  - Use modern UI kit.
  - Make mobile-ish.
  - Fix a couple minor things.

Test Plan:
{F127155}

{F127156}

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: aran, epriestley, chad

Maniphest Tasks: T4585

Differential Revision: https://secure.phabricator.com/D8504