Method able_to_close

DSView/pv/mainwindow.cpp:466–479

    }

    bool MainWindow::able_to_close()
    {
        if (_device_agent->is_hardware() && _session->have_hardware_data() == false){
            _sampling_bar->commit_settings();
        }
        // not used, refer to closeEvent of mainFrame
        save_config();
        
        if (confirm_to_store_data()){
            on_save();
            return false; 
        } 
        return true;
    }

    void MainWindow::on_protocol(bool visible)
    {