Added functionality for Tailgate and Average Speed.

[FireWizard52]

Hi,

While implementing MQTT function, I noted that both Average Speed and the Tailgate was missing in the sensor, resp binary sensor, section. So I made some add on coding in the dashboard py file.
It works for me, but I have no idea if there is a side effect in Home Assistant, such as the choice for the icon (mdi:ruler)
See below:

   Sensor(
        attr="fuelAmountLevel",
        name="Fuel level",
        icon="mdi:water-percent",
        unit="%",
    ),
    FuelConsumption(),
    Sensor(
        attr="distanceToEmpty", name="Range", icon="mdi:ruler", unit="km"
    ),
    Sensor(
        attr="averageSpeed",
        name="Average speed",
        icon="mdi:ruler",
        unit="km/h",
    ),
    Sensor(
        attr="hvBattery.distanceToHVBatteryEmpty",
        name="Battery range",
        icon="mdi:ruler",
        unit="km",
    ),

AND

    BinarySensor(
        attr="doors.rearRightDoorOpen",
        name="Rear right door",
        device_class="door",
    ),
    BinarySensor(
        attr="doors.tailgateOpen",
        name="Tailgate",
        device_class="door",
    ),
    BinarySensor(
        attr="windows.frontLeftWindowOpen",
        name="Front left window",
        device_class="window",

Please check.

[molobrakos]

Thanks, can you turn this into a pull request?