Fix SEGFAULT when compiling with Qt 5.14.0

For unknown reasons this did not SEGFAULT with Qt<5.14.0.

Official Qt docs says that deleteLater is the preferred method
https://doc.qt.io/qt-5/qobject.html#deleteLater

src/overlaycontroller.cpp

@@ -1543,8 +1543,7 @@ void OverlayController::OnNetworkReply( QNetworkReply* reply )
                         "QNetworkReply::NetworkError = "
                      << reply->error();
     }
-    reply->request().~QNetworkRequest();
-    reply->~QNetworkReply();
+    reply->deleteLater();
 }
 
 } // namespace advsettings