HTML5 Tag Support - header, footer, nav, section, etc.
When creating a store template. Using HTML5 Tags such as header, footer, nav, main, etc. The store will sometimes without warning remove the tags breaking the store design. Especially noted with the "header" tag which it flags as not being allowed.
Please allow support so we can use proper, semantic, tags to help improve SEO for our stores and allow for a better user experience.