For my website, I'd like to improve the sidebar by creating foldable lists to expand the content. However, the basic Foldable List snippet does not actually meet my needs. Rather than clicking some text to expand a list, I'd like to have a clickable button of some kind (an arrow? a plus sign?) to expand the content below, while the main text would still link to a specific page. You can see a good example of what I'm looking for on the left-hand side of this website.
So… does Wikidot have anything like this?