Prevent hang on close while waiting for EOS
Prevent hang on close while waiting for EOS

ethz-asl/qgc_asl,ethz-asl/qgc_asl,ethz-asl/qgc_asl,ethz-asl/qgc_asl,Hunter522/qgroundcontrol,Hunter522/qgroundcontrol,Hunter522/qgroundcontrol,ethz-asl/qgc_asl,Hunter522/qgroundcontrol,Hunter522/qgroundcontrol,Hunter522/qgroundcontrol