UI: Add UUID to file-based list widgets to uniquely identify items #1
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List widgets are currently used as playlists in source properties, but only contain the file paths and no other identifying information.
This can lead to files being added multiple times, so when changes to list order occurs, plugins cannot uniquely identify which duplicate item was actually changed (because they're only identified by the path).
By adding a UUID to the user data role of a list item, an additional unique information is added that allows plugins to de-duplicate list items.
From Pat, just did this so I can get a build