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- Made the folder CRUD functionality preserve query parameters so that
``raw_id_fields`` popups work seamlessly.
- Fixed the changelist to not crash when images are broken.
- Changed the admin fieldsets to only show fields related to one file
type when a cabinet file is filled in already.
- Fixed a bug where adding subfolders would succeed, but redirect to the
root folder.
- Added an admin action for moving multiple files at once to a different
folder.