Updating to manually initialize cookie manager on new window open for IE

When a new window is requested by the browser, the driver creates
one, but does not set the window handle of the window to a proper
value. This is normally not an issue, but in the edge case where
the user wants to manipulate cookies in the new window, the cookie
manager does not have a window handle set to facilitate the transfer
of cookie information from the driver code to the browser. This
change rectifies that problem.