title: Prestashop 1.7.2: add 3 fields to contact us page
body: <p>I added 3 fields to the layout at \themes\classic\modules\contactform\views\templates\widget\contactform.tpl and they show up perfect.</p>
  
  <p>I added these 3 fields to the DB table customer_thread.</p>
  
  <p>Contact requests are saved into this table except for the 3 new fields.</p>
  
  <p>I also changed the CustomerThread.php class in</p>
  
  <pre><code>public static $definition = array(
      'table' =&gt; 'customer_thread',
      'primary' =&gt; 'id_customer_thread',
      'fields' =&gt; array(
          'id_lang' =&gt;    array('type' =&gt; self::TYPE_INT, 'validate' =&gt; 'isUnsignedId', 'required' =&gt; true),
          'id_contact' =&gt; array('type' =&gt; self::TYPE_INT, 'validate' =&gt; 'isUnsignedId', 'required' =&gt; true),
          'id_shop' =&gt;    array('type' =&gt; self::TYPE_INT, 'validate' =&gt; 'isUnsignedId'),
          'id_customer' =&gt;array('type' =&gt; self::TYPE_INT, 'validate' =&gt; 'isUnsignedId'),
          'id_order' =&gt;    array('type' =&gt; self::TYPE_INT, 'validate' =&gt; 'isUnsignedId'),
          'id_product' =&gt; array('type' =&gt; self::TYPE_INT, 'validate' =&gt; 'isUnsignedId'),
          'email' =&gt;        array('type' =&gt; self::TYPE_STRING, 'validate' =&gt; 'isEmail', 'size' =&gt; 254),
          'tel' =&gt;        array('type' =&gt; self::TYPE_STRING, 'validate' =&gt; 'isString', 'size' =&gt; 254),
          'naam' =&gt;        array('type' =&gt; self::TYPE_STRING, 'validate' =&gt; 'isString', 'size' =&gt; 254),
          'voornaam' =&gt;        array('type' =&gt; self::TYPE_STRING, 'validate' =&gt; 'isString', 'size' =&gt; 254),
          'token' =&gt;        array('type' =&gt; self::TYPE_STRING, 'validate' =&gt; 'isGenericName', 'required' =&gt; true),
          'status' =&gt;    array('type' =&gt; self::TYPE_STRING),
          'date_add' =&gt;    array('type' =&gt; self::TYPE_DATE, 'validate' =&gt; 'isDate'),
          'date_upd' =&gt;    array('type' =&gt; self::TYPE_DATE, 'validate' =&gt; 'isDate'),
      ),
  );
  </code></pre>
  
  <p>The 3 new fields are tel, naam and voornaam.</p>
  
  <p>What am I missing ? </p>