Automatically show folder list

When I first log in to Virtualmin, it does not show the list of my folders. Clicking on Manage Folders lists the folders and lets me view them one at a time. However, if I click on the Webmin tab then go back to the Mail tab, the folders present themselves and remain wherever I then navigate to.

The default tab is set to Mail (in Virtualmin Themes Configuration) but I cannot see a way to force the mail tab to show the folders. Is there a way to do it?