Better type clozes

This fixes two problems, [#2208](https://code.google.com/p/ankidroid/issues/detail?id=2208) and the unreported one that the type cloze feature compared the typed text to the correct text + the hint.

Now this is generally much closer to the [Anki desktop version](https://github.com/dae/anki/blob/da777160bce038ddfded55af7ed613bbfa0cf121/aqt/reviewer.py#L434-L448).