Replace Suggests: gnome-themes with Recommends: gnome-themes-standard

since Adwaita is the preferred window manager theme and we want it to be
installed by default.

git-svn-id: svn://anonscm.debian.org/pkg-gnome/desktop/unstable/metacity@35171 db0db5de-e4c8-0310-9441-90abf70311f7