Feature I miss from Outlook -- Display total # of items in a folder

The ability to switch a folder between showing the number of unread items and showing the total number of items in the folder. Here’s a screenshot from Outlook:


You can see this in the title bar:

In this case (7/1689) means 7 unread messages in 1689 conversations.

That requires me to select the folder though. The Outlook feature lets me see the total number of items in a bunch of folders at a glance, w/o having to select each one.