R1:df7f56d8e3b7

Minor CSS tweaks Conpherence

Summary: Minor pixel shifts with new header ui in place.

Test Plan: Desktop, Mobile, Tablet, with and without search and participants open

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17725