#885 'edit' button only if academicCalendar.start_date/end_date is set
#885 'edit' button only if academicCalendar.start_date/end_date is set

uclouvain/osis,uclouvain/osis,uclouvain/osis_louvain,uclouvain/OSIS-Louvain,uclouvain/osis,uclouvain/osis,uclouvain/osis_louvain,uclouvain/osis_louvain,uclouvain/OSIS-Louvain,uclouvain/OSIS-Louvain