Conpherence CSS Widget Tweaks

Summary: Semi-decent pass at cleaning up the Conpherence dropdown and widgets. Will continue to update but have diff questions.

Test Plan: Testing Conpherence in my sb.

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D6043