UX: Force refresh model to update last_run_at after a query is run

assets/javascripts/discourse/controllers/admin-plugins-explorer.js.es6

@@ -98,6 +98,7 @@ export default Ember.Controller.extend({
     },
 
     goHome() {
+      this.send('refreshModel');
       this.set('selectedQueryId', null);
       this.transitionToRoute('adminPlugins.explorer');
     },

assets/javascripts/discourse/routes/admin-plugins-explorer.js.es6

@@ -18,5 +18,10 @@ export default Discourse.Route.extend({
 
   setupController: function(controller, model) {
     controller.setProperties(model);
+  },
+  
+  actions: {
+  refreshModel: function() {
+    this.refresh();
   }
-});
+}});