Change to Flying Field Manager terminology
Change to Flying Field Manager terminology

Also fixed button and panel state transition bugs

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