The flow allow to initiator controller to redraw its content after the
click of the link and before sending the URL of the new window.

Show a warning in test, test part and sections if the number of max.
attempts is overwritten by under elements

- 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

backgrounds

And tests of the enrollment process, finally.