Move generic part to bundle

modules/core/www/assets/js/loginuserpass.js

-window.readyHandlers = [];
-window.ready = function ready(handler) {
-  window.readyHandlers.push(handler);
-  handleState();
-};
-
-window.handleState = function handleState () {
-  if (document.readyState === 'interactive' || document.readyState === "complete") {
-    while(window.readyHandlers.length > 0) {
-      (window.readyHandlers.shift())();
-    }
-  }
-};
-
-document.onreadystatechange = window.handleState;
-
 ready(function () {
   // your code here
   var button = document.getElementById("submit_button");

src/js/bundle.js

@@ -6,6 +6,22 @@ import xml from "highlight.js/lib/languages/xml";
 import php from "highlight.js/lib/languages/php";
 import json from "highlight.js/lib/languages/json";
 
+window.readyHandlers = [];
+window.ready = function ready(handler) {
+  window.readyHandlers.push(handler);
+  handleState();
+};
+
+window.handleState = function handleState () {
+  if (document.readyState === 'interactive' || document.readyState === "complete") {
+    while(window.readyHandlers.length > 0) {
+      (window.readyHandlers.shift())();
+    }
+  }
+};
+
+document.onreadystatechange = window.handleState;
+
 $(document).ready(function () {
     $('#language-selector').on('change', function () {
         $("#language-form").submit();