* added a new member: port_id winLooperPort; We'll use it to send flattened BMessages(like _UPDATE_ / B_VIEW_RESIZED(MOVED)) to our BWindow counterpart.
* SendMessageToClient( BMessage ) sends that message BWindow's looper port.
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4806 a95241bf-73f2-0310-859d-f6bbb57e9c96