config_service: Fixed multiple ajax requests in the front page while the page determines whether a …

appengine/config_service/ui/src/config-ui/front-page.html

Index: appengine/config_service/ui/src/config-ui/front-page.html
diff --git a/appengine/config_service/ui/src/config-ui/front-page.html b/appengine/config_service/ui/src/config-ui/front-page.html
index 4caa89b1af57d748cb25f35a502ed876edb02e00..f8ca57546e536347e4b0255a363b0423c1223ab9 100644
--- a/appengine/config_service/ui/src/config-ui/front-page.html
+++ b/appengine/config_service/ui/src/config-ui/front-page.html
@@ -54,7 +54,6 @@
     </style>
 
     <iron-ajax
-        auto
         id="requestConfigs"
         url="/_ah/api/config/v1/config-sets?include_last_import_attempt=true"
         handle-as="json"
@@ -117,6 +116,13 @@
         }
       },
 
+      ready: function() {
+        document.addEventListener('fetch-configs', function() {
+          this.isLoading = true;
+          this.$.requestConfigs.generateRequest();
+        }.bind(this));
+      },
+
       _formatName: function(name) {
         var tempName = name.substring(name.indexOf("/") + 1);
         return tempName.includes("/") ?