Includes addition of classes by JS to ensure CSS selectors don't have to reference the data attributes.
This helps clarify that you will still be able to see the folder. Follows the phrasing used for the "No folders…" message.
Live regions need to be in the original HTML of the page to work. We were generating the summary in JS. This changes the JS to only generate the contents of the summary so changes to its contents are announces by the existing live-region.