{{! A wrapper for all account pages. @block account-heading The page's title. @block account-content The content for the main part of the layout. @param class string A name for the current page, added as a class to the account wrapper. @param nav string If "hidden", no nav will be shown. @param nav_page string If matches a string in navigation.html, that link will be made active. @param header string If "hidden", no header will be shown. If "top", header will be shown above the nav. Otherwise, header will be shown above the content. }}