That is a bit too special for a general addition, but you can add it easily already.
See Manual->Advanced Setup how to create/modify (our pi image one already) it. If your printer has slug xxx you just add to <command> the slug like <command slug="xxx"> and the command will appear in the printer context menu so it is assigned to your printer and you can call it.
What I have put on my todo is adding the usb power tool for linux to the next image.