When viewing other users' messages, the current user's username is displayed as page title on message list page

If a user with read all messages permission is viewing another user's message list (at /user/[uid]/messages), then the page title/headline of that page is the current user's username (not the username of the message list owner). This can be quite confusing.

Instead, the page title/header should be something like 'Person1's messages". Also, it might be good to keep the unread message count in the page title/header (like we do when a user visits his own message list).

--Ben