title: Enter keypress is not detected on keypress function
body: <p>I am trying to detect enter key press inside tinmyce editor and it's working fine for all the keys but its not working for enter key. </p>
  
  <pre><code>setup : function (instance) {
       instance.on("keypress", function(e) {
               var Keycode = (e.keyCode ? e.keyCode : e.which);
               alert(Keycode);
  
         });
  }
  </code></pre>
  
  <p>In above code its alerting all the keys except ENTER. i don't know whats the issue there. </p>