add global wp draw on a map when load file

src/Waypoint.cc

src/Waypoint.h

src/uas/SlugsMAV.cc

src/uas/SlugsMAV.h

src/uas/UASWaypointManager.cc

src/uas/UASWaypointManager.h

src/ui/MainWindow.cc

src/ui/MapWidget.cc

src/ui/SlugsDataSensorView.cc

src/ui/SlugsPIDControl.cpp

src/ui/WaypointList.cc

src/ui/WaypointList.h