Closing nav item when clicking on an open one

Change-Id: Ib5394a33cd4c2f1ec71dd2c956d8c38321cfbbdc
diff --git a/src/app/core/nav/nav.ts b/src/app/core/nav/nav.ts
index 2082efb..8c68457 100644
--- a/src/app/core/nav/nav.ts
+++ b/src/app/core/nav/nav.ts
@@ -30,6 +30,10 @@
   }
 
   activateRoute(route: IXosNavigationRoute) {
+    if (this.navSelected === route.state) {
+      delete this.navSelected;
+      return;
+    }
     this.navSelected = route.state;
   }