Bulk renaming of non-Text files in the editor
As a result of which I thought perhaps the default prefix for bulk
renaming files should depend on which category they are in.
Also, I can't imagine it is a good thing to be bulk renaming files that
Can't imagine it's very useful to bulk rename Misc files or Fonts
either, for that matter, but I figured I'd leave them in just in case.
I didn't give much thought to the error message for renaming files that
cross categories, but I'm not brilliant at writing them so if there is a
better way to change it I *could* fix that.