[Evolution] Threaded message sort

[David Bell <david DB7654321 dyndns org>]

I use descending message sort (newest first) and the threaded display
and would like there to be an option to modify the sorting in threads. 
Currently when viewing descended sorted threads, all messages are sorted
time descended, including threaded replies -- This makes reading replies
in chronological order a bit awkward.  An example:

Current descended sorted threads:

Mesg 1 -- 3pm
 Reply 2 5pm
  Reply 4 7pm
  Reply 3 6pm
 Reply 1 4pm

My proposed threaded sort:

Mesg 1 -- 3pm
 Reply 1 3:10pm
 Reply 2 5pm
  Reply 3 6pm
  Reply 4 7pm

Does that make sense?  :)  Could this be implemented as a threading
option (Or does it already exist?)?