Update Diffusion UI
Summary: This updates (all?) of Diffusion/Audit to new UI, included edit and other extra form pages. It's fairly complete but I don't know all the nooks and crannies so to speak to fully verify I didn't mess anything up.
Test Plan: Tested creating new repositories, browsing, searching, auditing. Need more eyes.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D15487