fix preview running app on standlone

package.json

@@ -94,7 +94,7 @@
         "c9.ide.navigate": "#c191d9b92f",
         "c9.ide.newresource": "#981a408a7b",
         "c9.ide.openfiles": "#7fa4a97fed",
-        "c9.ide.preview": "#c530a7978d",
+        "c9.ide.preview": "#b6d2dfe356",
         "c9.ide.preview.browser": "#c50007ebbc",
         "c9.ide.preview.markdown": "#ab8d30ad9f",
         "c9.ide.pubsub": "#a85fb27eca",