Herald - make flag color display
Summary: It used to say "Mark with flag 7" or whatever, and now it says "Mark with flag Checkered"
Test Plan: noted previous rule I made was more understandable
Reviewers: epriestley
Reviewed By: epriestley
CC: Korvin, epriestley, aran
Differential Revision: https://secure.phabricator.com/D8158