R1:bba14118c793

Add setProfileHeader to PHUIHeaderView for reuse

Summary: Moves some profile css into PHUI, cleans up mobile view and desktop spacing.

Test Plan: Test Project at desktop and mobile breakpoints.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D15106