[Evolution] Newer mail in a folder hint (mail count is not enough)

[Adam Gibson <agibson ptm com>]

One thing that is keeping me from using evolution is a feature that I am 
having trouble finding an equivalent for that Thunderbird has.  When you 
have a bunch of unread mail in an imap folder(not everyone has time to 
read them all) and new mail comes in on that folder a * will be placed 
next to the folder to let you know that new mail has arrived since you 
last looked at that folder.

I tend to have a bunch of folders with unread mail(subjects are not 
interesting enough to look at yet or just not enough time or whatever) 
so it is nice to have some kind of hint that new mail has arrived.  Just 
increasing the folder mail count is not enough because I can not 
remember dozens of folders worth of mail counts which caused me to have 
to scan every folder 1 by 1 every once in awhile to see if new mail has 
arrived.

Does evolution have a feature somewhere that can be enabled that gives 
this functionality?  I would really like to use evolution because of the 
calendar integration with the gnome desktop but this one feature is 
really hard to live without with my mail usage.