I tried this, but the whole "Favorite Folders" section itself is not visible.
Any ideas on how to get the entire "Favorite Folders" section back onto the
"Folders List" panel.
Click on the envelope icon in the navigation pane for Mail and Favorite
Folders will appear above the Folder List. From Help:
Favorite Folders is available only in the Mail pane. The Favorite Folders
pane cannot be removed, hidden, or resized. It is not possible to display
Favorite Folders in other panes, such as Folder List.