bug#27053: 26.0.50; x-show-tip gets wrong mouse position if frame moves w/o mouse moving on macOS

[martin rudalics]

> To repro, start 'emacs -Q' then eval in order without moving mouse:
>
> (set-frame-position nil 0 0)
> (run-with-timer 0.1 nil (lambda ()
>                            (x-show-tip (propertize "hello" 'face 'tooltip))))
>
> ;; Tooltip should appear where mouse cursor is
>
> (set-frame-position nil 100 100)
> (run-with-timer 0.1 nil (lambda ()
>                            (x-show-tip (propertize "hello" 'face 'tooltip))))
>
> ;; Tooltip should appear where mouse cursor is, but does not.
>
> If you then move your mouse and reeval the timer, it will show the tip
> at the mouse cursor.
>
> Emacs is apparently not tracking the mouse position through frame
> movement. I encounter this often when resizing/moving the frame w/
> keyboard shortcuts.

I'm not quite sure I understand.  On Windows the tooltip appears at the
same display position in both cases because the mouse cursor did not
move.  Where does your second showing of a tooltip take place?

martin