fix editor start with src and dist using es-dev-server

dist/editor/system/extensions/ext-grid.js

@@ -1651,8 +1651,14 @@ System.register([], function (exports) {
         return _wrapRegExp.apply(this, arguments);
       }
 
-      var gridIcon = "grid-icon.xml";
-
+      /**
+       * @file ext-grid.js
+       *
+       * @license Apache-2.0
+       *
+       * @copyright 2010 Redou Mine, 2010 Alexis Deveria
+       *
+       */
       var extGrid = exports('default', {
         name: 'grid',
         init: function init(_ref) {
@@ -1787,7 +1793,7 @@ System.register([], function (exports) {
 
                     buttons = [{
                       id: 'view_grid',
-                      icon: svgEditor.curConfig.extIconsPath + 'grid.png',
+                      icon: 'grid.png',
                       type: 'context',
                       panel: 'editor_panel',
                       events: {
@@ -1799,7 +1805,7 @@ System.register([], function (exports) {
                     }];
                     return _context.abrupt("return", {
                       name: strings.name,
-                      svgicons: svgEditor.curConfig.extIconsPath + 'grid-icon.xml',
+                      svgicons: 'grid-icon.xml',
                       zoomChanged: function zoomChanged(zoom) {
                         if (showGrid) {
                           updateGrid(zoom);