Issue 2816 - Restore Preview functionality

lib/inspectorObserver.js

 /*
  * This Source Code is subject to the terms of the Mozilla Public License
  * version 2.0 (the "License"). You can obtain a copy of the License at
  * http://mozilla.org/MPL/2.0/.
  */
 
 let InspectorObserver =
 {
   init: function()
   {
@@ skipping 47 matching lines @@
         target.client.request({
           to: target.form.elemhidehelper,
           type: "nodeinfo",
           nodeActor: node.actorID
         }, function(response)
         {
           if (!response.nodeData)
             return;
 
           panelWindow.openDialog("chrome://elemhidehelper/content/composer.xul",
-              "_blank", "chrome,centerscreen,resizable,dialog=no",
-              response.nodeData, response.host);
+              "_blank", "chrome,centerscreen,resizable,dialog=no", response);
         });
       }
     }, false);
 
     //Override button style for light DevTools theme
     let style = panelWindow.document.createProcessingInstruction("xml-stylesheet", 'href="chrome://elemhidehelper/skin/devToolsOverlay.css" type="text/css"');
     panelWindow.document.insertBefore(style, panelWindow.document.firstChild);
 
     inspectBtn.parentNode.insertBefore(button, inspectBtn);
   }
 };
 
 InspectorObserver.init();