OO-991: allow grading with only comments to user, enhance the group assessment panel to manage comments, wording...

OO-991: fix an issue with enable/disable in tabbedpane component, add embedded editor for tasks / solutions, add author / uploader in a lot of places, wording for relatives dates in workflow

OO-1561 replace lang parameter in pwd change and registration email with language parameter to not collide with html entity ⟨

OO-991: add some cancel buttons, show the choosed tasks in the list of coached groups and identities and other fixes

OO-991: selenium test for the group task ( individual task ) with score and automatic passed/failed, all steps made with a correction / revision step

OO-1559: add sync of coaches by ldap user attributes, refactor the batch sync to handle mix configuration with attributes and group bases at the same time

OO-991: selenium test for the group task with standard settings and all steps made with three hands, selenium test for enrollment with unlimited sized groups ( follow a bug with this particular setting )

OO-991: selenium test for the group task with standard settings and all steps made with three hands, selenium test for enrollment with unlimited sized groups ( follow a bug with this particular setting )