Please fill in this template when reporting a bug, unless you know what you
are doing.
Description of Problem:
I understand why in this release you can't do this, but it would be nice if
you could.  At first it may seem like a bad concept but it's not.  In
addition to the normal vfolder definition, you should be able to include
specific messages from other folders as well as all messages in specific
folders.

For example, there's a company I do a lot of work with.  I have two folders
for them, "occmx" and "occmx-reference".  Messages relating to them also
land in the inbox sometimes as well as in my "Sent Items" folder.  There's
no way I can use message header criteria to describe all of the messages
that I manually drag into the occmx folder.  For example, I may place an
order or deal with an ISP technician on occmx's behalf.  This exchange
contains no keywords or email addresses that can be used to tie its
messages into a vfolder, but it DOES relate to this company.  However, if I
could define the vfolder as also including all messages from certain imap
or local folders, then that would be a great help.  Associating specific
messages with a vfolder by dragging them would be a little bit trickier,
but it would just mean associating that messages unique id with the
vfolder.  You'd keep a reference list for any messages manually associated
like this and delete the association when the message itself was deleted or
when the message was dragged out of the vfolder.

The vfolder definition dialogue could be updated to contain a list of
entire folders associated with it and a scrollbox listing the individual
messages manually associated with it.  In the actual vfolder display, such
messages could be marked discretely and get a "dissociate from vfolder"
context menu item.

Steps to reproduce the problem:
1. Attempt to put an entire folder of messages into a vfolder.
2. Attempt to drag or copy a message into a vfolder.
3. 

Actual Results:
Doesn't work.

Expected Results:
Ought to work.

How often does this happen? 
N/A

Additional Information: