Quiz: The "Check" button shouldn't be displayed for questions not fully supported

This issue should only be tested in 1 device. Create a qtype site plugin that returns a prevent submit message. In web as admin, create a quiz with adaptive behaviour (or immediate feedback) and add the qtype you created in step 1. Add also a question of a different type. In the app, attempt the quiz. Check that you don't see the "Check" button in the qtype you created, but you see it in the other types of question.