Attaching and quoting messages

[Peter Bloomfield <PeterBloomfield MindSpring com>]

Balsa would be greatly enhanced by a capability to attach or quote an 
arbitrary message. The `File' menu could be expanded to:
   Include file...
   Include message
   Attach file...
   Attach message
   ...
where the `message' versions would refer to the currently selected 
message.  (Well, I guess it could be
   Include file...
   Include message...
   Attach file...
   Attach message...
   ...
where the `message' versions would pop up an index to choose from, but 
that's more advanced!)

It would also be nice to be able to drag'n'drop a message into the text 
area or the attachments area to do the same things: include (quoted), 
and attach (verbatim), respectively.  Which brings me to the 
point...there's already some code in src/sendmsg-window.c for receiving 
drag'n'dropped stuff, but I can't figure out what it does.  Can anyone 
offer a clue?

Any other comments are welcome, as always.

Peter