differential - lazy man's attempt at updated design
Summary: basically made the header elements for the individual panes and cleaned up the panes to make it look okay. tried to copy colors from @chad 's mocks.
Test Plan: looks good to me
Reviewers: epriestley, chad
Reviewed By: chad
CC: aran, Korvin
Maniphest Tasks: T2004
Differential Revision: https://secure.phabricator.com/D4174