Add function to call ace-window with forced aw-dispatch

[bertulli]

Hi, I apologize if this was already asked. I use ace-window with aw-dispatch-always set to nil, as I really like the use of M-o as a switch windows when I have only 2 windows. However, I also find very comfortably having the dispatchable actions (like v to split a window). Without changing the value of aw-dispatch-always, I thought that something like this can be added:

(defun ace-window-manual-dispatch (arg)
  "Calls `ace-window' with ARG asking for the dispatch, even if `aw-dispatch-always' is nil.

This could be useful to use the advanced commands"
  (interactive "p")
(let ((aw-dispatch-always t))
  (ace-window arg)
  ))

I use that in my init file and it works, and I bound that to C-M-o, in order to have like a "super" ace-window call. If that is useful, I would be very happy to create a pull request for it.

[dandrake]

Alternatively, maybe...doing three prefix args would force showing the dispatcher? That's starting to get a bit extreme, but using some kind of prefix arg for ace-window to force showing the dispatcher seems more idiomatic.

(Personally, I'd get rid of the delete-window behavior with two prefix args, since I never use that. )