Add about dialog

lib/ui/routes/home_route.dart

@@ -90,6 +90,11 @@ class _HomeRouteState extends HomeController {
         _openAppSettings();
         break;
 
+      /// Show about dialog
+      case BarCallbackActions.OPEN_ABOUT_DIALOG:
+        showAboutAppDialog(context);
+        break;
+
       /// Logout user
       case BarCallbackActions.ACTION_LOGOUT:
         _logoutRequested();