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-765: revert the change in FormBasicController which set the whole container as dirty on every click

OO-690: export to docx for QTI 1.2, prettier and with an archive containing the test and an other document with the same test with the responses

OO-760: replace the user name with the full name in the return box of the task course building block

OO-622: make the enable/disable flag consistent in the tunnel component, send same header in iframe mode

OO-758: fix the table search, hold the value by row and dataColumn instead of index, search all columns...

OO-756: check the key of the owner of lockentry instead of user name as the user name can be changed after the user be deleted

OO-753: remove the optimistic locking from SecurityGroupMemebership and make almost all field immutable

OO-749: check if the controller is disposed before updating the business path (with back is possible)

OO-747: in case of a login with no sites, no tabs, place a dummy panel and a gui stack to prevent the red screen

OO-737: hardened the method to prevent an exception in the renderBodyOnLoad (which is probably not usefull)