Don't block user interface; perform operations in background (Multiple processes for open windows)

[cyberduck]

95fe7fd created the issue

It would be nice to be able to do something else with a separate window while another window is performing a long task. Whenever I try to delete a folder with a lot of files in one window and then go to another, I get the spinning wheel and I cannot do anything.

[cyberduck]

@dkocher commented

See c0b84f2 and make sure to try out the latest nightly build (2495 or later) at http://update.cyberduck.ch/nightly/ available soon.