#38 Getting all top level windows

[Andrei Kirshin]

Please add support for getting all open windows:
TopLevelWindow[] WebClient.getAllWindows() [not
static of course]
Currently the only way to get the list of all windows is to
registering a listener and keeping track of all
webWindowOpened events, which is less convenient.
Oh, and also there is no webWindowClosed event (a
window also can be closed from JavaScript), but there is
a separate RFE on this.

Thanks a lot.

[Mike Bowler]

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user_id=46756

Added method WebClient.getWebWindows(). Note that this will
return all web windows which includes frames so you'll
need to do an instanceof check to get just the ones you care
about.