R1:f04d8ab1a747

Further improve unit/lint rendering

Summary:
I think this improves things, let me know if you have feedback.

Also addresses T840.

Test Plan: See screenshots...

Reviewers: vrana, btrahan, jungejason

Reviewed By: vrana

CC: aran, zeeg

Maniphest Tasks: T840

Differential Revision: https://secure.phabricator.com/D2357