OO-2997: don't set margin of image with size like 28x30 (default by IE), give a real name to images...

OO-2985: scroll to the warning message if someone want to delete its work in the drawing interaction

OO-2975: delete imported calendar after course, group and user deletion, implement a check every 10 runs to remove deprecated imported calendar, append the job to the scheduler

OO-2968: fill the title and short title independently of the assessment informations, add a fallback solution to the list to show the course title instead an empty title