Session timeout bug fixed

When the user doesn't perform any action on an opened web page for a particular length of time (in case of Bookmark Ninja this is 30 minutes), the server invalidates the session. After this if you click on any command button or link that generates a request to the server the web application will freeze. This hasn't been handled properly. Now in this case a "Session timeout. Click on OK to reload the page" message box comes up. If you click on OK, the page will reload and you can continue your work.