Merge branch 'develop' into 'production'

src/plainui/jinja2.py

src/plainui/jinja2/plainui/components/calendar.html

src/plainui/jinja2/plainui/components/list_events.html

src/plainui/jinja2/plainui/fahrplan.html

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

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

src/plainui/static/error_pages/403.html

src/plainui/static/error_pages/403.svg

src/plainui/static/error_pages/403_FORBIDDEN.jpg

src/plainui/static/error_pages/404.html

src/plainui/static/error_pages/404.svg

src/plainui/static/error_pages/404_NOT_FOUND.jpg

src/plainui/static/error_pages/500.html

src/plainui/static/error_pages/500.svg

src/plainui/static/error_pages/500_INTERNAL_SERVER_ERROR.jpg

...lainui/static/plainui/fonts/SairaStencilOne-Regular.woff2

src/plainui/styles/_import-fonts.scss

src/plainui/styles/components/_buttons.scss

src/plainui/styles/components/_event.scss

src/plainui/styles/hub-assembly.scss