bug#23568: 25.0.94; Mode line menus appear incorrectly in some monitor configurations

[martin rudalics]

> In the end, we would still leave the function interface so that users
> can still call the discussed procedures from lisp code, right?

I think so, yes.

> (defun display-monitor-attribute (attribute &optional frame x y)
>   "Return the value of the attribute of the 'current' monitor.
> By default, use the frame info to determine the current monitor,
> but if x and y are non-nil then use the given coordinates to
> determine it."
>   (if (and x y)

Probably, FRAME should be replaced by DISPLAY as in other ‘display-...’
functions.  X and Y must be checked properly to avoid throwing an error
when they are used in the arithmetics.  And the doc-string should
explicitly state that the first argument is ignored when X and Y are
both non-nil.

martin