Summary: makes a nice side filter for most UI elements. only place this getds a
little funky is on the test console; a second, inner filter list appears for the
"affected" filters.
Test Plan: viewed each side filter and verified ui. for each filter, interacted
with the ui and made sure things looked right and there were no errors
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, epriestley
Maniphest Tasks: T631
Differential Revision: https://secure.phabricator.com/D1289
