Fix up the JobState enum.

* s/LocalQueued/QueuedLocal/
* s/RemoteQueued/QueuedRemote/
* s/Killed/Canceled/
* Added jobStateToGuiString method

Change-Id: Id511933e7c82582abb98c75019c9766f86759844
Merge topic 'job-state-cleanup' into master

4c046699 Fix up the JobState enum.