empathy-chat-window: update the tab icon when the TpChat is disconnected (#597680)
empathy-chat-window: update the tab icon when the TpChat is disconnected (#597680)

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