Merge branch 'improve-online' into 'main'

AKModel/admin.py

AKModel/forms.py

AKModel/locale/de_DE/LC_MESSAGES/django.po

AKModel/templates/admin/AKModel/room_create.html

AKModel/tests.py

AKModel/views.py

AKOnline/admin.py

AKOnline/forms.py

AKOnline/locale/de_DE/LC_MESSAGES/django.po

AKOnline/migrations/0001_virtualroom_new.py

AKOnline/migrations/0002_rework_virtual.py

AKOnline/migrations/0003_rework_virtual_2.py

AKOnline/migrations/0004_rework_virtual_3.py

AKOnline/migrations/0005_rework_virtual_4.py

AKOnline/models.py

...ne/templates/admin/AKOnline/room_create_with_virtual.html

AKOnline/views.py

AKPlan/templates/AKPlan/plan_room.html

AKSubmission/templates/AKSubmission/ak_detail.html

locale/de_DE/LC_MESSAGES/django.po