Bug 462543

Currently, when copying files (or performing other relevant file actions), multiple tasks are executed concurrently: select a range of files and paste will result in task A, and selecting and copying other files will result in task B, which are executed in concurrent.

In many cases, this does not make sense, or even lower the eventual time require -- disks have their maximum speed capacity, and changing between and seeking different files wastes more.

Of course, this is not always the case, such as between multiple pairs of devices in parallel.

Therefore, it would be ideal if the user is allowed to enqueue the operation, so they are performed sequentially. Currently there is the pause mechanism, but it won't resume when the previous task is done.
It would also be great if the queue can be modified afterwards when needed, particularly if the queue is long.