Minimize rs data

READY FOR MERGE

update the UI to deal with delayed fetching of revisions and other data.  This is the UI companion PR to https://github.com/mozilla/treeherder-service/pull/104 on the service.

* Removed some dead code related to keeping the hide/show jobs buttons up to date with the most severe status.  Our counts take care of that now.
* Also fixed a couple bugs like not sorting platforms when new ones come in.