R1:58aa3fdc9d44

Make View Revision in Mail a little more resilient

Summary: Converts to table so text wraps on long strings well, button always stays top right, better spacing underneath.

Test Plan: Mail, Gmail, mobile

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D15955