bug#42304: 27.0.50; Emacs does not adjust to global font scaling anymore

[Robert Pluim]

>>>>> On Sat, 31 Jul 2021 16:23:47 +0200, Lars Ingebrigtsen <larsi@gnus.org> 
>>>>> said:

    Lars> Robert Pluim <rpluim@gmail.com> writes:
    >> >>> If I re-scale all fonts on my Gnome desktop with e.g.
    >> >>> 
    >> >>> dconf write /org/gnome/desktop/interface/text-scaling-factor 2.0
    >> >>> 
    >> >>> Emacs is the only application that does not change its font size
    >> >>> accordingly.  Instead, I have to re-start Emacs.

    Lars> I can reproduce this problem in Emacs 28.

I think attempting to get this to work with impure gtk is a losing
proposition. It doesnʼt work in the pgtk branch either. Harano-san,
would you have any suggestions?

Robert
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