Edit action "launches edition of the attachment through WEBDAV.
IIRC It's only displayed when webdav works and the user has IE or the
FoXWiki plugin enabled thus I don't think it should go away. "
The edit actions appears on Windows FF, IE 6,7,8.
I don't have the FF addon and this addon works just for some special FF version.
This action shouldn't be visible on default.