Merge branch 'master' into pages-jonglieren

aleksis/core/admin.py

aleksis/core/checks.py

aleksis/core/menus.py

aleksis/core/migrations/0013_extensible_model_as_default.py

.../core/migrations/0014_multiple_recipients_announcement.py

...igrations/0015_announcement_recipient_extensible_model.py

aleksis/core/mixins.py

aleksis/core/models.py

aleksis/core/settings.py

aleksis/core/templates/core/announcements.html

aleksis/core/templates/core/index.html

aleksis/core/util/core_helpers.py

aleksis/core/views.py

apps/official/AlekSIS-App-Alsijil

apps/official/AlekSIS-App-Chronos

apps/official/AlekSIS-App-DashboardFeeds

apps/official/AlekSIS-App-Exlibris

poetry.lock