[peralta] Chat State Notifications inital patch. I assume that every wm will focus-out before iconify. If that is not the case I am going to use window-state-changed too [to be tested]

move var that have nothing to do with GTK to gajim instead of roster or gajim.py: contacts, groups, newly_added, to_be_removed, awaiting_messages (was queues), nicks, allow_notifications, con_types, sleeper_state

evil send_message in TC sends in active jid. so you need to set_active_tab before sending message. I put that as a comment in both places