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Other changes
- Fix multi-file upload validation and support Django 3.2.19 security update [465](https://github.com/ome/omero-web/pull/465)
- Declare portalocker as external dependency [457](https://github.com/ome/omero-web/pull/457)
Bug fixes
- Avoid creation of empty file annotations [466](https://github.com/ome/omero-web/pull/466)