title: add custom type in settings.settings
body: <p>I would like to use configuration file .settings to save this struct:</p>
  
  <pre><code>struct sR22Protocole
  {
      Int32 inputkey;
      Int32 outputkey;
      Int32 voltage;
      Int32 Ohm;
      Int32 Correction;
  };
  </code></pre>
  
  <p>In the settings designer, I can add different type but it doesn't show my struct in the browse section. Is there any way that the designer has access to my struct? If no, Is there any way to add it programmaticaly?</p>