Thanks. Try Marked; it is exactly what I wanted. It's $14, but I decided to reward whoever did what apparently no one else (including me) can be bothered to do.

Thanks. Try Marked; it is exactly what I wanted. It's $14, but I decided to reward whoever did what apparently no one else (including me) can be bothered to do. I have tried MarkText, which is yet another editor with a viewer but it's free.