Only set the mapper encoding if it's really found (in the case where it
is not defined by the configuration), don't set it with a default one,
use only the default to deliver the media resource if needed

Randomize the delivery of SCORM files for authors and reload the content
after the settings have been changed to propagate quickier changes like
encoding and make them effective

Reviewers with comment permission are allowed to see the self evaluation
of the user which gave them the permission. Assignment with "Only self
evaluation" doesn't have and doesn't need the option "Invitee can see
self evaluation"

Open the preview folder in a new bread crumb instead of a modal dialog
to allow opening viewer and editor in full screen mode.

Merge branch 'OpenOLAT_14.1' of ssh://gnaegi@office.frentix.com/home/gnaegi/repositories/OpenOLAT.git into OpenOLAT_14.1

openolat#95: check if the precondition is null before trying to replace the ids in the migration process