Summary: Testing this out, feels much less heavy and more readable for me, but open to other feedback. I've also corrected/normalize the header sizes and heights.
Test Plan:
Copied some real Phriction documents to my local install, read them all. Checked header sizes and make sure px are used for more absolute control over sizes.
{F387327}
{F387328}
{F387329}
Reviewers: btrahan, epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T7963
Differential Revision: https://secure.phabricator.com/D12587
