Accept "current" as value for set_desktop_for_window

[Zayon]

It would be great to be able to do this:

kdotool search --name 'XXX' set_desktop_for_window current windowactivate

That would be the equivalent of kdotool search --name 'XXX' set_desktop_for_window $(kdotool get_desktop) windowactivate.

The goal is to be able to do something like this:

kdotool --shortcut Meta+something --name "pull XXX window" --name 'XXX' set_desktop_for_window current windowactivate because it does not work with the $() notation