Merge pull request #2341 from DonLakeFlyer/MissionItemCategories

qgroundcontrol.pro

qgroundcontrol.qrc

src/MissionEditor/MissionEditor.qml

src/MissionManager/MavCmdInfo.json

src/MissionManager/MissionCommands.cc

src/MissionManager/MissionCommands.h

src/MissionManager/MissionItem.cc

src/MissionManager/MissionItem.h

src/QGCApplication.cc

src/QGCToolbox.cc

src/QGCToolbox.h

src/QmlControls/MissionCommandDialog.qml

src/QmlControls/MissionItemEditor.qml

src/QmlControls/QGCView.qml

src/QmlControls/QGroundControl.Controls.qmldir

src/QmlControls/QGroundControlQmlGlobal.cc

src/QmlControls/QGroundControlQmlGlobal.h