So, I thought maybe you could make it show the list of files inside that folder in this situation. I think it'd be handy if you're going through several folders to see their contents, you wouldn't have to open each of them and go back.
Not that that's a very tedious job, since xy remembers the last folder you opened on the parent directory, though.
ps: sorry if this was already proposed, but a search for "preview folders" got me "The following words in your search query were ignored because they are too common words: folders preview."
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