Fix the Some issue about remocon

https://github.com/robotics-in-concert/rocon_qt_gui/issues/70

https://github.com/robotics-in-concert/rocon_qt_gui/issues/54

https://github.com/robotics-in-concert/rocon_qt_gui/issues/58

https://github.com/robotics-in-concert/rocon_qt_gui/issues/51