improve speed when quitting Gajim, and prevent to send twice STATUS event when we quit

src/common/connection.py

@@ -203,8 +203,8 @@ class Connection(ConnectionHandlers):
 			# after we auth to server
 			self.old_show = STATUS_LIST[self.connected]
 		self.connected = 0
-		self.dispatch('STATUS', 'offline')
 		if not self.on_purpose:
+			self.dispatch('STATUS', 'offline')
 			self.disconnect()
 			if gajim.config.get_per('accounts', self.name, 'autoreconnect'):
 				self.connected = -1

src/roster_window.py

@@ -3762,6 +3762,8 @@ class RosterWindow:
 				self.quit_on_next_offline -= 1
 				if self.quit_on_next_offline < 1:
 					self.quit_gtkgui_interface()
+			else:
+				# No need to redraw contacts if we're quitting
 				if accountIter:
 					model[accountIter][C_SECPIXBUF] = None
 				if gajim.con_types.has_key(account):