Bug suggestions order

Fix bug 1030619

This is the UI companion to https://github.com/mozilla/treeherder-service/pull/179

* This just supports the changes in the artifact structure made by the service PR.
* I also added slight shading to the error lines in the failure summary area because it was hard on my eyes for them to all be the same.  I thought it might be hard on other people's eyes, too.
* Fixed where the key commands work when the cmd key is pressed (like cmd-opt-k to open the console window).