Running Qml viewer doubles the Symbian device's idle current consumption

When QML Viewer is open the current consumption in sleep mode increases from ~8 mA to 16mA. It looks like the sensor orientation detection implemented in deviceorientation_symbian.cpp is causing this.

Active window status is often used to detect if the application is currently being used, that could be used to fix the above problem:

    if (event->type() == QEvent::WindowActivate) {
        enableSensorChannel();
    } else if (event->type() == QEvent::WindowDeactivate) {
        disableSensorChannel();
    }