Prepare the LaTeX to produce MathML by fmath converter, better
extraction of oMath to inline the equation in Word, fix a rare case of
single choice not being outputed

And some performance optimizations.

- Move topic edit buttons to the list of topics
- Only one view to edit topic and organizers
- Organizer selection in a multi dropdown menu
- Help buttons to initial values

to have the advantages of both:
- Nice GUI of the selection view
- Table display of the edit view

Remove the default passed value (false) if the cut value is not choosed
as mode to calculate passed / failed. Finer default correction mode in
course element after chossing a test (grader if grading enabled, manual
if test has manual by coach defined...)

A report with the list of courses and tests with the questions used in
the tests, their master reference inclusive ownership of tests,
questions and master questions.

backgrounds

And tests of the enrollment process, finally.