When any change in favourites occurs, update the "favourite templates" list displayed below the search form.
- When we favorite from the search results, the fave should appear in the list.
- When we unfave from either the search results or the list, the list item should be struck out (and not appear on the next page load).
- Re-favoriting a struck-out list item should un-strike it and that template should be faved in the search results (if it appears in subsequent searches).
Favoriting or unfavoriting from either template form, or in other browser tabs, is not in scope for this task.