commit updated syntax for g analytics tag, re #11131

arches/app/templates/base.htm

@@ -93,14 +93,12 @@
 
     {% if app_settings.GOOGLE_ANALYTICS_TRACKING_ID != None %}
 
+        <script async src="https://www.googletagmanager.com/gtag/js?id={{app_settings.GOOGLE_ANALYTICS_TRACKING_ID}}"></script>
         <script>
-            (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-                (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-                m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-            })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
-
-            ga('create', '{{app_settings.GOOGLE_ANALYTICS_TRACKING_ID}}', 'auto');
-            ga('send', 'pageview');
+          window.dataLayer = window.dataLayer || [];
+          function gtag(){dataLayer.push(arguments);}
+          gtag('js', new Date());
+          gtag('config', '{{app_settings.GOOGLE_ANALYTICS_TRACKING_ID}}');
         </script>
 
     {% endif %}