Remove html code when we close dialog either with cancel button or x …

…icon at the top of dialog. Closes refinery#860.

core/public/javascripts/wymeditor/jquery.refinery.wymeditor.js

@@ -1781,10 +1781,16 @@ WYMeditor.INIT_DIALOG = function(wym, selected, isIframe) {
   // focus first textarea or input type text element
   dialog.find('input[type=text], textarea').first().focus();
 
+  // init close_dialog when user clicks on cancel button
   doc.find('body').addClass('wym_iframe_body').find('#cancel_button').add(dialog.find('.close_dialog')).click(function(e){
     wym.close_dialog(e, true);
   });
 
+  // init close_dialog when user clicks on small x icon at the top of dialog
+  $('.ui-dialog-titlebar .ui-dialog-titlebar-close').click(function(e){
+    wym.close_dialog(e, true);
+  });
+
     //pre-init functions
   if($.isFunction(wym._options.preInitDialog)) {
     wym._options.preInitDialog(wym, window);