Reveal in Finder with multi-selection in same folder does not work

[kieferrm]

Testing #41473.

On macOS.

1. Open a workspace that contains several folders
2. Select file F1 in folder A.
3. Select files F2 and F3 in folder B.
4. Reveal in Finder from context menu.
   -> two finder windows open, one for A and one for B
   -> F1 is selected in the first window
   -> F3 is selected in the second window

This shows that a multi-selection works in general for Reveal in Finder. However, it does not work as expected if all files in the selection are in the same folder.

[isidorn]

Duplicate of #42576