Connect to NameOwnerChanged so the CM chooser can be updated when new CMs join and old ones die.
Connect to NameOwnerChanged so the CM chooser can be updated when new CMs join and old ones die.

Signed-off-by: Jonny Lamb <3d1fb3642aaab2ff70e3392a5ab916bf99eed6a3@collabora.co.uk>

Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets