Hi folks,  when a copy / move process is already running and the user chooses
to copy / move some other files / folders, nautilus should consider adding the
second copy / move process to a queue and start processing it when the first
copy / move process is finished. It could try to be smart there, like having a
look at the blockdevices used and only when it makes sense copy / move more
than one process at a time.  regards Michael