Filebrowser admin not compatible with Django 6

Seems like Django 6 again broke the admin layout of filebrowser:

Django 5.2
<img width="1156" height="532" alt="Image" src="https://github.com/user-attachments/assets/58759c2a-bf2e-408d-a5f5-e783489135b8" />

Django 6
<img width="1214" height="733" alt="Image" src="https://github.com/user-attachments/assets/5a287b56-def3-4593-8802-bb8553226139" />