Should we use a common xfce4 subdir for all modules? I would prefer that.
In general: <basedir>/xfce4/<subdir>/<file>. The module-specific subdir can
be optional.
E.g ~/.config/xfce4/panel/contents.xml
~/.config/xfce4/desktop/menu.xml
/etc/xdg/xfce4/kioskrc
xfce4-session does not follow this scheme, xffm does, I think.
What do you think?
Jasper