When you add a random question to a quiz, then a question
is chosen randomly from the same category.
Questions are not repeated in a particular quiz attempt.
This still needs more testing, but it's looking OK so far.
created. Works OK after limited testing.
I've also renamed some strings to do with "Random Match", so that this
question type is now called "Random Short-Answer Match".
Later there will be a new 'Random Match' which randomly selects one of the
existing "Match" questions.
of questions. These use 2 or more short answer questions at
random to construct a questions where you have to match
answers to questions. Only lightly tested so far.
Quiz questions can now be edited with Richtext editor.
Sundry little fixes along the way.
