R1:46baa3b7ae3b

Herald - Kill Tabs

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