There's a few things going on here, that unfortunately must
happen in lockstep:
- The gnome-desktop-3.0 dependency gets replaced by gnome-desktop-4
and gnome-bg-4. The code in ui/background.js required minor updates.
- The libnma dependency gets replaced by a libnma4 dependency. The
code in misc/modemManager.js required minor updates.
- The gtk3 dependency is torn down everywhere but tests. Some
missing GdkPixbuf dependencies had to be added to compensate for
its lack.
- gtk_init_check() is no longer called
As a result, we replace a hard gtk3 dependency with a soft gtk4
run-time linking one, only added indirectly through gnome-bg-4
and libnma4.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2655>
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