Switching loader to something generic

css/heartbeat.css

@@ -176,7 +176,7 @@ Temporarily hiding all irrelevant content */
   right: 24px;
   min-width: 64px;
   min-height: 64px;
-  background: url('/sites/default/files/inline-images/lRq6T7n.gif');
+  background: url('../images/drupal-loader.gif');
   background-size: contain;
 }