title: Wordpress meta box values display to custom fields
body: <p>I've added meta boxes to my posts using the action "<code>add_meta_boxes</code>" to add/change custom settings like background-color, etc.</p>
  
  <p>When I enable the custom fields in my screen options, all values of my meta boxes are displayd in these custom fields!</p>
  
  <p>There are also showing up in the selectbox to add a new "custom field".</p>