bug#51173: 28.0.60; gnus-article-describe-key doesn't work

[Juri Linkov]

>> Hpw 'bout the patch below?
>
> I confirm that the patch fixes this regression,
> while not breaking other cases.
>
> Maybe this patch also obsoletes this code in the same place:
>
>                        ;; Clicks on the menu bar produce "event" that
>                        ;; is just '(menu-bar)', for which
>                        ;; `mouse-set-point' is not useful.
>                        (and (not (windowp (posn-window (event-start event))))
>                             (not (framep (posn-window (event-start event)))))
>
> While testing with this code removed, clicks on the menu bar still work
> without errors.

Now the fix was pushed to emacs-28.