NameError: name 'DbusPrototype' is not defined

are there others ?

add close button [no new string here, thanks to GTK+] and show it for when we read received single messages instead of showing cancel [which is when we send]; add icon to send button; move ui preparation code to the right method and add some code to handle show/hide for close/cancel button. add a fixme for after 0.9 for string thing

remove a useless test that introduced a bug: when we restore conversation we are not active tab yet (tab is not drawn yet), but we'll in some ms, so we can safely do systray.remove_jid() as we already removed the events from awaiting_messages