Avoid windowhandler.html in GET requests from links

Some generated url could already detect the windowId and send with the first get avoiding windowhandler.html.

In the actual model basically this are the steps from a click in a link:

• Click in link (GET) to new page < Response windowhandler.html
• windowhandler.html detect windowId by window.name and get page again adding dsrid and windowId in cookie

So I suggest the detection of windowhandler.html be done before the first get avoing one more request.
To this every urls should have a dsrid(could be equals as windowId) and the storeWindowTree function should also add the cookie, same as in windowhandler.html

Clicking in a link the cookie will be generated and in server side read identifying the windowId

To explain better I attatched a patch with some changes.

Could anyone try this?