- displays an error notice when JavaScript is off, consistently with other admin screens that depend on JavaScript
- keeps the main `h1` visible
Minor clean-ups:
- makes code indentation consistent in `site-health.php` and `site-health-info.php`
- removes a couple of `<div class="wp-clearfix"></div>` as that's not the intended usage of `wp-clearfix` (those divs didn't do anything anyways)
Fixes#46717.
Built from https://develop.svn.wordpress.org/trunk@45076
git-svn-id: http://core.svn.wordpress.org/trunk@44885 1a063a9b-81f0-0310-95a4-ce76da25c4cd