No "thermalState" property in QML DeviceInfo

The QML DeviceInfo Element does not have a "thermalState" property.
Unlike the Qt-Class QSystemDeviceInfo, which has a currentThermalState()
method.

What is more strange because the QML DeviceInfoElement has a
monitorThermalStateChanges property and signal
thermalStateChanged is defined.
So you can enable monitoring and act on StateChanges but you can
not read out the current thermal state.