Simple feature beg

[Jason L Tibbitts III <tibbs@hpc.uh.edu>]

There are two things I miss from Mew, the mail reader I used to use:

1. it would learn its concept of filing rules after you filed a message
   once.  (Mew's filing is like 'B m'.)  It did this simply based on the
   From: header, but it was still quite useful.  I don't want to set up
   filing rules foe every possible piece of mail.  It also supplied a
   useful default generated from the user-id in the From: line, so this
   message would file into 'tibbs' by default.

2. I would kill for a little something that let me pop into a folder, read
   some mail, and quit not back to the Group buffer but to whatever buffer
   configuration I had before I popped in.  This would make it so much
   simpler to read a new incoming message without having to screw up my
   buffer history.

 - J<