[Evolution] Account Settings

[David Ronis <ronis ronispc chem mcgill ca>]

I'm using evolution 2.12.0 and things seem to work properly.  I was
playing with some of my account preferences and can't seem to undo the
change I made.  I have a mbox file in my home directory,
$HOME/Mail/Inbox.Spam that is used to store spam-hits from one of my
anti-spam programs. I changed the receiving email option to 
be a "Standard Unix mbox spool file".  This works, but unlike my
previous configuration, where the Inbox.Spam folder appeared as a
subfolder of "On this Computer", now it appears on its own.  Worse it
has subfolders: Inbox, Junk, and Trash.  

This is simply another mbox file on this computer and there should be no
need to treat it as a remote.   

Any idea how to restore the older behavior?  I've tried several of the
more likely settings, but the file-select browser doesn't seem to allow
me to select the file, except for the one mentioned above.

Thanks in advance for any help/suggestions.

David