Make download a child of detail

So if we were to write a comment (a better place would probably be in the html, near <div class=modal...), it would say something like, "This template used to be displayed in a modal dialog, and one day may be again. We need to keep the class because various style rules are based on things being nested inside a div with this class"? Seems like we should at least add such a comment.

But I wonder whether we couldn't also replace modal-dialog with something like detail-root throughout the detail folder? Or are we inheriting some of the modal-dialog rules from vendor code like bookstrap or application-global styles? If so that would be worth mentioning in the comment, too.