WIP missed bit for CommandLineInterface.

cli/src/main/groovy/com/jdbernard/wdiwtlt/cli/CommandLineInterface.groovy

@@ -322,6 +322,8 @@ Configuration:
                     "to see a list of valid options.")
                 return null
         }
+
+        return list
     }
 
     public Album selectAlbum(LinkedList input) {