Bug#1029821: change gnome-desktop's default choice of Japanese input methods for Debian

[James Addison]

Package: libgnome-desktop-4-2
Followup-For: Bug #1029821

I also noticed that some of gnome-desktop's default locale-to-input-source
mappings provide multiple entries, delimited by the '+' character:

https://gitlab.gnome.org/GNOME/gnome-desktop/-/blob/43.2/libgnome-desktop/default-input-sources.h#L31

It's probably a question to ask them, but I am wondering whether it'd be
possible (and/or sensible) to provide *both* anthy and mozc in the default
input sources (which would correspond to adding ibus-anthy and ibus-mozc both
as 'Recommends', instead of a choice between them).