Make queue for "File operations" window (the one showing at Notification Area while copying larger files). Right now it's copying files from-and-to many places and disks at once, sometimes making system unusable.

Secondly the queue could be sortable by user choice:
- normal (FIFO queue)
- smallest first (or last)
- head-to-head (one bit of each of operations, so they could end at the same time)
- manual sort
etc. etc.