give option to cancel import

[Scott Ringwelski]

in some cases an import may be taking a very long time, be using too much cpu, or otherwise need to be cancelled (especially if beatbox assumes the music folder incorrectly). give an option to cancel an import.

[Bruce Pieterse (octoquad)]

This has been implemented but the cancel button doesn't actually do anything! Is this a placebo button? lol

Thanks for making beatbox! Keep up the great work! :)

[Bruce Pieterse (octoquad)]

After a successful import, the cancel button is still visible.

[Scott Ringwelski (sgringwe)]

Settle down, settle down. I haven't done anything with that button yet. Actually I took it out for now.

[Scott Ringwelski (sgringwe)]

Now that nothing is done automatically (user must select the correct folder), removing the urgency back to no milestone.