Added script (#6124)

Author: christof-wittreich

web/js/components/util/google-tag-manager.js

@@ -1,5 +1,13 @@
 /* eslint-disable */
 
+window.dataLayer = window.dataLayer || [];
+window.dataLayer.push({
+  event: "virtualPageView",
+  page_location: location.href,
+  page_title: document.title,
+  page_referrer: document.referrer,
+});
+
 export default {
   /*
   * @func dataLayerPush object to GoogleTagManager