Queue/worker indicator (top right) should show current job, not queued job

[jab416171]

I queued up a new scan while one was already running, and the red dot in the top right updated to show the status of the queued one, so it shows "0/0 Running Scan Photos..."

This is pretty useless, and it should probably show the status of the job that's actually running, and maybe the size of the queue.