More minor Remarkup tweaks

Authored by chad.


More minor Remarkup tweaks

Fixes T7444, Fixes T7963. A few small changes:

  • Section headers are slightly larger
  • Regular headers are slightly darker
  • hr's have more padding, standard blue color
  • code blocks now have correctly attached header colors
  • Phriction emdeded links have color anchor color

Test Plan: Lots of various pages in Phriction, Diviner.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T7963, T7444

Differential Revision: https://secure.phabricator.com/D12596