This bug is solved in sid, with version 1:2.24.3~3 of meta-gnome2 (source of gnome-desktop-environnement)
meta-gnome2 (1:2.24.3~3) unstable; urgency=low [...] * Make gnome-network-admin only a dependency of gnome, as an alternative to network-manager-gnome. [...] -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org