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

[martin rudalics]

> There is also display-buffer--maybe-at-bottom, but I need help
> from Martin because I don't understand how to replace
> display-buffer--maybe-at-bottom using display-buffer-in-direction.

What are you missing?  I suppose you'd just have to prepend an
additional alist entry like (direction . bottom).

martin