Autoscan and remove isolated files created by resolving conflicts in sync (by Dropbox)

I use Zotero + Dropbox a lot. As as mentioned by others, sometimes Dropbox just did not work right on syncing the .sqlite file, which, to the best of my knowledge, no good resolution exists so far. But another issue cause by this is there'll be a lot isolated(never linked to by the database) files left in the storage folder when Dropbox try to resolve the conflicts between different Zotero database versions. I think at least there's one simple thing that Zotero might help by adding a new feature:

Scan the whole storage directory and remove those items never mentioned in the sqlite file.

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