Add normalizeEl method

Author: Avaer Kazmer

app.html

@@ -295,6 +295,13 @@
   result.reject = reject;
   return result;
 };
+const _normalizeEl = el => ({
+  nodeName: el.nodeName,
+  tagName: el.tagName,
+  attrs: el.attrs,
+  value: el.value,
+  childNodes: el.childNodes ? el.childNodes.map(childEl => _normalizeEl(childEl)) : [],
+});
 
 const loginPromise = _makeNullPromise();
 let loginToken;