OSIS-2169 Refactored GroupElementYearForm
OSIS-2169 Refactored GroupElementYearForm

	modified:   base/forms/education_group/group_element_year.py

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