R1:e1683f353e0e

Add plain status icon colors

Summary: This adds a set of plain (blueish) icons for use instead of black.

Test Plan: Photoshop

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D7434