JButton saveConfigButton = new JButton(
                JMeterUtils.getResString("config_save_settings")); // $NON-NLS-1$
        saveConfigButton.addActionListener(this);
        saveConfigButton.setActionCommand(ACTION_SAVE_CONFIG);
        mergeAndWritePanel = new FilePanel(
                "Merge and write results to output file", EXTS); // $NON-NLS-1$
        mergeAndWritePanel.addChangeListener(this);
        mergeAndWritePanel.add(saveConfigButton);
        mergeButton = new JButton("Merge");