UI to edit items in place

[ksunden]

Currently if you decide you want to change a scan that was previously enqueued (but not yet run, including scans re-enqueued due to failure) the only option is to:

• Load the scan
• Make your edits
• Enqueue at the tail of the queue
• Reorder so its in the right position
• Remove the old version

The underlying utilities do allow updating in place, but we have no UI for it

I have not considered how I would present it (another button, right click menu, does it show up where the "normal" enqueueing is but have a different button, popup window, etc)