The groups-privileges page takes care of removing privileges
before deleting groups and users; this is to be moved soon to a
proper group/user deletion API.
This includes loading the common style sheets at low resolutions
and removing the undescribable redundancy in light.css.
The harder part was getting the navbar right, because it relied
heavily on the distinction between navbar.css and light.css.
This is still a work in progress.
- Réorganisation des parties
- Ajout d'un formulaire de suppression
Le formulaire de suppression ne fonctionne pas à cause d'un erreur dans le `session.commit()` (`AssertionError: Failed to add object to the flush context!`). Cela est peut-être du aux relations qui mettent orphelines les contenus dépendants du membre. Cf [delete cascades](https://docs.sqlalchemy.org/en/latest/orm/cascades.html#delete) dans sql alchemy