Create new wiki -> Clone wiki folder doesn't copy any files

[Jermolene]

Using the "Create new wiki" in the wiki list window to clone an existing folder-based wiki fails to copy any files.

Original discussion: https://groups.google.com/d/msgid/tiddlywiki/13de6cd9-1226-4ef8-a381-b4e4fdcbdc92n%40googlegroups.com