Scrolldown text edit at end of whole update process to show

UPDATE_SUCCESS message.

mainwindow.cpp

@@ -321,6 +321,7 @@ void MainWindow::onRestartExitTimer() {
     m_exitTimer->stop();
     m_exitTimer->start(60 * 1000);
 
+    scrollDownTextEdit();
     ui->updateStatus->setEnabled(false);
 }