Cocktail also allows toggling of viewing Hidden Folders...
The issue I have is that updates to .rockbox overwrite everything (including wiping your WPS and associated files).
I raised this issue on IRC, the solution is to have the wps, themes and backgrounds folders in their own directory rather than within .rockbox. Unfortunately it's going to take more than one voice to get this issue fixed.
Until then, updates to .rockbox have to me manually done with Finder, or by command line.
Unless someone has a better solution??