Merge branch 'master' into 71-support-events-and-extra-lessons-in-class-register

.github/PULL_REQUEST_TEMPLATE.md

aleksis/apps/alsijil/data_checks.py

aleksis/apps/alsijil/forms.py

aleksis/apps/alsijil/locale/ar/LC_MESSAGES/django.po

aleksis/apps/alsijil/locale/de_DE/LC_MESSAGES/django.po

aleksis/apps/alsijil/locale/fr/LC_MESSAGES/django.po

aleksis/apps/alsijil/locale/la/LC_MESSAGES/django.po

aleksis/apps/alsijil/locale/nb_NO/LC_MESSAGES/django.po

aleksis/apps/alsijil/locale/tr_TR/LC_MESSAGES/django.po

aleksis/apps/alsijil/managers.py

aleksis/apps/alsijil/menus.py

aleksis/apps/alsijil/migrations/0003_extra_mark.py

aleksis/apps/alsijil/migrations/0008_global_permissions.py

aleksis/apps/alsijil/migrations/0009_group_roles.py

aleksis/apps/alsijil/model_extensions.py

aleksis/apps/alsijil/models.py

aleksis/apps/alsijil/preferences.py

aleksis/apps/alsijil/rules.py

aleksis/apps/alsijil/tables.py

...apps/alsijil/templates/alsijil/class_register/groups.html