It's nice.
It's a class move from both sir Alex and Mou.
But doing this is pretty easy, it brings him no harm but only praises. Saying sorry for the crap he said to Wenger is a bit more difficult though :D.
But all of his talks recently kinda ease the heat in the past already, Mou showed lots of respects for the counter parts. I wish he did it when Wenger hadn't announce retirement yet... But this is great enough for the fans to see
Wenger was given a silver vase after the United game, here what it read. Beautifull act of respect by Mou and Sir Alex.
On another note, I would like to say I'm really impressed by Mou, he was very class to Wenger when the news of him leaving were released. Great to see they seemed able to put their former difference aside for the end of Wenger time at Arsenal.