bug#35592: Use display-buffer-in-direction for completion-like windows

[martin rudalics]

>> The former (it's a three liner).  But maybe some work remains wrt
>> action arguments like 'window-min-height', 'window-height' and
>> friends.  I doubt that you have already exhausted all possibilities.
>
> Why three-liner?  I see one-liners in your comments.

I meant the defun, the doc-string and the body.

> I tried to
> replace the whole display-buffer-below-selected with your one-liner
> (display-buffer-in-direction buffer (cons '(direction . below) alist))
> and also the whole display-buffer-at-bottom with your one-liner
> (display-buffer-in-direction buffer (cons '(direction . bottom) alist))
> and everything works fine, I see no problems.

'display-buffer-in-direction' doesn't yet process 'window-min-height'
(and 'window-min-width') entries correctly.  I still have to set up
semantics for these ...

martin