* Remove absolute URIs from admin page
The rest of the links on this page are absolute paths without a
specified hostname, but these in particlar use build_absolute_uri. I
am running linkding behind two different load balancers which makes
these links bubble up the "internal" hostname instead of the hostname
I actually got to the page from.
* Add LD_USE_X_FORWARDED_HOST
See: https://docs.djangoproject.com/en/6.0/ref/settings/#std-setting-USE_X_FORWARDED_HOST
* Bump Django
* Render error messages in English
* Remove unused USE_L10N option
* Associate errors and help texts with form fields
* Make checkbox inputs clickable
* Change cancel button text
* Fix tests
