The default folders used to be created by gnome-software, as that was
where folder management used to be implemented. Since then, folder
management via drag and drop was implemented in the shell, and the
gnome-software code was removed.
The only bit that still involves gnome-software are the default folders
that are created on first run. Given that everything else has moved to
the shell, it makes sense to take over that part as well.
projects / gnome-shell.git / commit