Android: "Remember password" dialog gets down the login webview

Hi Ebryn!

Thanks for your library, it works great in my iOS app.

I'm experiencing a problem in Android, after the user push de authorize button the webview hides the "remember password" dialog. 

If the user push the back button and select remember, close the app, start it again and try to login it works and retrieve the tweets.

Any clue to fix it?

Thanks in advance,
Roberto
