title: How add custom binding to DropDownList
body: <p>I have binding enterPress</p>
  
  <pre><code>// Custom keypress on ENTER event binding for input elements.
  kendo.data.binders.enterPress = kendo.data.Binder.extend({
      init: function (element, bindings, options) {
          kendo.data.Binder.fn.init.call(this, element, bindings, options);
          var binding = this.bindings.enterPress;
          $(element).bind("keypress", function (e) {
              if (e.which == 13) {
                  binding.get();
              }
          });
      },
      refresh: function () { }
  });
  </code></pre>
  
  <p>If I use it to DropDownList I have error:</p>
  
  <blockquote>
    <p>Uncaught Error: The enterPress binding is not supported by the
    DropDownList widget</p>
  </blockquote>
  
  <p>How to make enterpress for DropDownList ?</p>