🚀 go-pugleaf

[This is a PS to an answer I sent to Barry alone; however, I thought of
a more useful answer, which I'm now sending to the whole list.)

Although the general answer is "no", you can hack around this by
treating the message as a "draft" -- use "restore draft" to get it into
the sending window, edit it there, and then use "file into folder" to
put it back.  That will do the trick, albeit somewhat cruftily.

I always intended to make messages really editable, but never got around
to it.  -- Nathaniel