Update Audit to use Cards in ObjectList

Summary: For general consistency with Differential / other application searches. May look at "Cards" as the default view for everything.

Test Plan: Reload my Audit page, easier to read and find status colors.

Reviewers: epriestley, btrahan

Reviewed By: btrahan

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D8935