Folders in your "Import Call List" screen can be "Favorited" and will be shown at the top of your list with a filled star icon. This can be accomplished by marking a report folder as a favorite in Salesforce Lightning or from the user interface.

To favorite or unfavorite a record from the UI, simply click on the star!

Alternately, to add a favorite from the Lighting Interface, follow these steps:

• Browse to the "Reports" tab
  
  
• Click "All Folders"
• Click the drop down to the right of the row for the folder you want to favorite and then select "Favorite".
  
  

• To un-favorite, follow the same steps, and click "Unfavorite" instead.