This changeset adds `required="required"` attributes to required form fields and uses `wp_required_field_message()` and `wp_required_field_indicator()` functions to improve the generated markup, and for better consistency with other required fields.
Props jackreichert, flixos90, afercia, sabernhardt.
Fixes#38460.
Built from https://develop.svn.wordpress.org/trunk@55026
git-svn-id: http://core.svn.wordpress.org/trunk@54559 1a063a9b-81f0-0310-95a4-ce76da25c4cd