[Redesign] Small pass at dashboards

Summary: Mostly for testing, I think these need to be re-written to just use PHUIObjectBox, which means re-writing ManiphestView or whatever. Suspect much work.

Test Plan: visist a few dashboards

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D12764