Modernize "revision update history" in Differential

Summary:
Ref T4585.

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

Test Plan:

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: aran, epriestley, chad

Maniphest Tasks: T4585

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