Summary: Ref T8099, this removes the gradient headers and their edge cases in Pinboard View, Setup Issues, Exceptions, and Document Heiriarchy.
Test Plan:
Tested each of these, grep for "gradient" and verify all states are gone.
{F410708}
{F410709}
{F410710}
{F410714}
Reviewers: btrahan, epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T8099
Differential Revision: https://secure.phabricator.com/D12944
ed8118d50c