This bug was manually imported from https://www.mediawiki.org/wiki/Extension:Quiz.
"The shuffle feature allows to shuffle a quiz with a single question."
- Update documentation so that the Shuffle button will appears when the change goes live (i.e. add a few questions to the quiz), i.e. https://fr.wikiversity.org/wiki/Aide:Quiz, https://en.wikiversity.org/wiki/Help:Quiz
- Change the code so that the shuffle button only shows up if there are at least 2 quiz questions