Merge branch 'fix/award-badges' into 'develop'

src/backoffice/locale/de/LC_MESSAGES/django.po

src/backoffice/locale/en/LC_MESSAGES/django.po

...backoffice/templates/backoffice/assembly_badge_token.html

src/core/models/assemblies.py

src/core/models/badges.py

src/plainui/urls.py

src/plainui/views/badges.py