On Windows AB submission does submit the complete path to files in the JSON as `file_name`, instead of just the basename.

This is an issue with streaming_extractor_music, which fails to deal with backslashes properly. It works if path separator is a forward slash.

See

https://community.metabrainz.org/t/picard-submits-full-file-path-as-file-name-value-for-acousticbrainz-submission-bug/564530

https://github.com/MTG/essentia/issues/1209

While this is primarily an issue with streaming_extractor_music we should still work around this in Picard.