Issue #3399270 by Masami, yas: Migrate to native JavaScript from jQuery (8)...

Issue #3399270 by Masami, yas: Migrate to native JavaScript from jQuery (8) (aws_cloud_instance_monitor.js)

Closes #3399270

js/cloud_horizon_chart.js

@@ -96,8 +96,8 @@
       rect.setAttribute('height', bbox.height);
       rect.setAttribute('fill', bgColor);
       rect.style.opacity = '0.8';
-      if (g) {
-        g.insertBefore(rect, item.selector + ' svg text');
+      if (g && g[0] && title && title[0]) {
+        g[0].insertBefore(rect, title[0]);
       }
 
       document.querySelector(item.selector).style.marginBottom = '0';