Quizmanager: Improve "Create New Question" Button naming
the button that lets you create a new question is not clearly labelled.
It should simply read "new question" / "neue Frage". It should also be at the bottom of the list, and not above the headline. A "+" sign might also help.
This issue is copied from: https://github.com/thm-projects/arsnova.click/issues/8