Refresh Conpherence UI

Summary: Cleans up a number of inconsistencies, makes Conpherence lighter, easier to read, make names larger, darker.

Test Plan: Review Conpherence chat in Main App, Durable Column, Mobile, Tablet

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D16531