ROS2运行rqt指令，出现一个警告，
RosPluginProvider._parse_plugin_xml() plugin file "C:\dev\ros2_galactic\share\rqt_gui_cpp/plugin.xml" in package "rqt_gui_cpp" not found
原因，
RosPluginProvider._parse_plugin_xml() plugin 在windows系统上不受支持。
参考，
https://github.com/ros-visualization/qt_gui_core/blob/6cab60142436ef3ca712856e402f1bda9150578f/qt_gui_cpp/CMakeLists.txt#L11-L15
ros2/ros2#914
