Hi,
At this point the Case Folder UI View, just wraps the Document Explorer UI View from the Content Toolkit. This will be changing in the future as we bring a richer content experience to view.
For the use case above, I would suggest an easier approach using the Document Explorer and a configuration option that was added last year.
If you look at the Document Explorer / Configuration / Content Management Advanced /
Display parent case folderOne click of that option and it just works.
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