Oops... Wasn't taking into account the possibility that start/end pitch/rate
could be different...
Fixed an issue where hidden files were accidentally being shown...

There's no good reason to ever have your .wav samples in a hidden folder
(if you're 'borrowing' from another app's hidden folder, you should
be copying them out first), and there is surely no reason in hell to
ever have hidden .wav files, so we'll assume that anything hidden
is not meant to be opened, and hide all of them in the browser.