OO-1124: don't fix the width of disabled rich text and align it, better contrast of disabled primary button, simplify DOM tree of the contact form...

OO-750: refactor the mail package to provide a MailManager as a service, enable sending HTML E-Mails, add a customizable E-Mail template with a small editor in admin

OO-622,CL-225: remove username from GUI in place where is not really needed and students can see it. Mark others place with //TODO username where it need more works and/or the username is only visible by author/coach/admin... Additional fix the setup sql for MySQL (index too long).

OO-377: map the reservations to the right roles, upgrade waiting list after a cancellation, better choice of templates, fix remove of reservations as coach/admin

OO-377: implements pending state or reservation for groups and repository entry access to participants

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branch : bps