contact-widget: move hbox_presence to grid_contact
contact-widget: move hbox_presence to grid_contact

There is no point keeping this even more complicated that it already is.

https://bugzilla.gnome.org/show_bug.cgi?id=666714

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