R1:ba5b32f5bb37

Add headericons a little more consistently

Summary: I kinda like these to differentiate the headers and different object types. Somethings duplicitive, but helps orient the clean header a bit.

Test Plan: Review each in sandbox.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D15394