OO-1121: check if the event has an end date, update the calendar REST mapper to check if begin and end date exists

OO-1068: split profile in two segments for the profile itself and the home page settings, add a preview, merge the profile and the portrait in the same controller

OO-1068 implement placeholder for text elements, fix setlabel bug, fix alignment in placeholder form layout

OO-981: check if the catalog is enable in details of course, add a "feature enabled" for site configuration