[5.1] Cancel button not working

[Orions_Stardom]

The 'Cancel' button that I introduced with the change to using javax.swing.SwingWorker isn't working - it calls SwingWorker.cancel(true); which *should* interrupt anything that's being done, but it doesn't appear to. Forcing it to keep trying until cancel() returns 'true' (indicating that it has been cancelled) doesn't change anything.

[Orions_Stardom]

I have added checks to isCancelled() in the cloning logic, which appears to have fixed this. It won't cancel until it finishes copying the current file, but that should not be a problem once the recursion problem is fixed.