bug#64270: 30.0.50; Font update for no toolkit menu

[Eli Zaretskii]

> From: Manuel Giraud <manuel@ledu-giraud.fr>
> Cc: 64270@debbugs.gnu.org
> Date: Tue, 27 Jun 2023 16:13:15 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > If this is not what you meant, then how would Emacs know which font to
> > select for menus when the default face's font is changed?
> 
> For my usage, I imagine that yes the menu font would change when I
> change the frame's default face.  But this because my menu face is
> already derived from the default face.
> 
> For the general usage, my idea (and what I start doing in my patch, see
> my first message) is to query the MENU_FACE_ID.  So the font into the
> menus would change if the user modify its menu face.

This is a misunderstanding: I didn't ask what would be the trigger to
change the font.  I asked how would Emacs know _which_ font to choose
for the menus?