[Redesign] ObjectBoxView colors

Summary: Removes setting colors on the headers and adds setting colors on an ObjectBoxView (which sets the headers). Ref T8099

Test Plan:
Tested each color, fixed workboard colors, added color to important setup issues.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T8099

Differential Revision: https://secure.phabricator.com/D12942