I am migrating from Outlook 2007 to Zimbra and have certain email folders, sub folders, and shared inboxes in my email folders/

I am hoping at the top my sidebar (above folders searchs, tags, zimlets), I can have another tab for favourites for my most used email folders. In fact, just as you can on Outlook.

I have searched the zimlet gallery and on google but haven't found anything that does this, and clues?