Hi Benny,

Thanks for the patch.  I've refactored it so that it's smaller and only
changes the htmlized portion if `org-mime-htmlize' was called on a
partial region.  What do you think about the attached alternative?

I guess given this patch `org-mime-toggle' should be bound to C-c M-o
rather than `org-mime-htmlize'.

If the changed version works for you I'd be happy to apply it.

Thanks! -- Eric