when we become offline, we remove the padlock

src/roster_window.py

@@ -1305,6 +1305,7 @@ _('If "%s" accepts this request you will know his status.') %jid).get_response()
 		if accountIter:
 			model.set_value(accountIter, 0, self.jabber_state_images[status])
 		if status == 'offline':
+			model[accountIter][6] = None
 			for jid in gajim.contacts[account]:
 				luser = gajim.contacts[account][jid]
 				luser_copy = []