Fix advanced port options in main serial window

src/ui/SerialConfigurationWindow.cc

@@ -132,7 +132,8 @@ SerialConfigurationWindow::SerialConfigurationWindow(LinkInterface* link, QWidge
         connect(ui.parEven, SIGNAL(toggled(bool)), this, SLOT(setParityEven(bool)));
         connect(ui.dataBitsSpinBox, SIGNAL(valueChanged(int)), this->link, SLOT(setDataBits(int)));
         connect(ui.stopBitsSpinBox, SIGNAL(valueChanged(int)), this->link, SLOT(setStopBits(int)));
-        connect(ui.advCheckBox,SIGNAL(clicked(bool)),ui.advGroupBox,SLOT(setShown(bool)));
+        connect(ui.advCheckBox, SIGNAL(clicked(bool)), ui.advGroupBox, SLOT(setVisible(bool)));
+        ui.advCheckBox->setCheckable(true);
         ui.advCheckBox->setChecked(false);
         ui.advGroupBox->setVisible(false);