Tweak object header UI
Summary: Increase font size and contrast of all Object Headers.
Test Plan:
Sample a few, find it easier to read. I've been using this locally for a while.
{F261868}
{F261869}
Reviewers: epriestley, btrahan
Reviewed By: btrahan
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D11221