Updating popup timeout to 120 seconds to allow users enough time to type...

Currently the InAppBrowser popup dialog dismisses within 40 seconds, it takes roughly 10 seconds to load) so effectively users have 30 seconds to type their oAuth credentials for Twitter/Facebook/Gmail etc.  This duration is 80% of the time too short and the dialog dismisses while user is typing.
We did a few tests and based on that it feels 120 seconds seems about ok to handle people who type slow.