Update backoffice presentation
Merge remote-tracking branch 'origin/feature-agenda' into feature-agenda

Conflicts:
	src/Corrigeaton/Bundle/ScheduleBundle/Resources/views/Classroom/edit.html.twig
	src/Corrigeaton/Bundle/ScheduleBundle/Resources/views/Classroom/index.html.twig
	src/Corrigeaton/Bundle/ScheduleBundle/Resources/views/Classroom/new.html.twig