Use one request to fetch dashboard report data and check version

app/assets/javascripts/admin/models/admin_dashboard.js

@@ -0,0 +1,14 @@
+Discourse.AdminDashboard = Discourse.Model.extend({});
+
+Discourse.AdminDashboard.reopenClass({
+  find: function() {
+    var model = Discourse.AdminDashboard.create();
+    return $.ajax("/admin/dashboard", {
+      type: 'GET',
+      success: function(json) {
+        model.mergeAttributes(json);
+        model.set('loaded', true);
+      }
+    });
+  }
+});