Sort burnup data chronologically after merging synthetic and "real" data
I think this is a sorting issue. But if I can't fake my way through this soon I'll maybe get the Fact engine running and use it to provide the data here, as a sort of half-step toward T1562?
Test Plan: Chart looks the same locally, will push and see if secure improves?
Reviewed By: amckinley
Maniphest Tasks: T13020
Differential Revision: https://secure.phabricator.com/D18854