Salomegeo google auth

I agree that we should always have the URL blocker running when the user has uProxy installed.

Also if you do that you can move connecting the URL blocker to global scope, so that it is only setup once.  The way things are right now, I think if the user did something strange like clicked Login to Google, then clicked Login to Facebook before completing the Google login, you would have 2 urlBlockers running at once - not sure if that would cause bugs but it seems a little weird-in-a-bad-way.