made changes to buttons

We had a talk with Gunnar and Anna and they think it is best that when you press "Practice question" you are only asking for one practice question but not entering a practice mode. So when you have answered the practice question you go back to a regular question and if you want a new practice question you will have to press the button again. This way it makes more sense that the buttons are alway the same, that "New Question" should alway be the default button.