Add "Cancel" button to Tor Connection when trying to connect to Tor
Right now, when Tor Connection is trying to connect to Tor there is a progress bar but no "Cancel" button.
If I close Tor Connection and open it again, I'm going back to the progress bar.
If I know that I made a typo while entering my bridges, I have to wait for the full progress bar anyway.
No big deal but we could have a Cancel button on the window with the progress bar.