Fix altitude relative to home default
Fix altitude relative to home default

RedoXyde/PX4_qGCS,CornerOfSkyline/qgroundcontrol,cfelipesouza/qgroundcontrol,cfelipesouza/qgroundcontrol,mihadyuk/qgroundcontrol,Hunter522/qgroundcontrol,CornerOfSkyline/qgroundcontrol,mihadyuk/qgroundcontrol,catch-twenty-two/qgroundcontrol,cfelipesouza/qgroundcontrol,kd0aij/qgroundcontrol,scott-eddy/qgroundcontrol,remspoor/qgroundcontrol,remspoor/qgroundcontrol,Hunter522/qgroundcontrol,kd0aij/qgroundcontrol,RedoXyde/PX4_qGCS,scott-eddy/qgroundcontrol,CornerOfSkyline/qgroundcontrol,kd0aij/qgroundcontrol,catch-twenty-two/qgroundcontrol,scott-eddy/qgroundcontrol,RedoXyde/PX4_qGCS,mihadyuk/qgroundcontrol,cfelipesouza/qgroundcontrol,mihadyuk/qgroundcontrol,ethz-asl/qgc_asl,Hunter522/qgroundcontrol,CornerOfSkyline/qgroundcontrol,ethz-asl/qgc_asl,scott-eddy/qgroundcontrol,kd0aij/qgroundcontrol,CornerOfSkyline/qgroundcontrol,catch-twenty-two/qgroundcontrol,cfelipesouza/qgroundcontrol,RedoXyde/PX4_qGCS,remspoor/qgroundcontrol,remspoor/qgroundcontrol,ethz-asl/qgc_asl,Hunter522/qgroundcontrol,Hunter522/qgroundcontrol,cfelipesouza/qgroundcontrol,catch-twenty-two/qgroundcontrol,mihadyuk/qgroundcontrol,scott-eddy/qgroundcontrol,ethz-asl/qgc_asl,Hunter522/qgroundcontrol,ethz-asl/qgc_asl,kd0aij/qgroundcontrol,CornerOfSkyline/qgroundcontrol,remspoor/qgroundcontrol,scott-eddy/qgroundcontrol,catch-twenty-two/qgroundcontrol,RedoXyde/PX4_qGCS,mihadyuk/qgroundcontrol,kd0aij/qgroundcontrol,remspoor/qgroundcontrol,RedoXyde/PX4_qGCS,catch-twenty-two/qgroundcontrol