Add mWh as unit of measurement (#2493)

Author: agners

docs/core/entity/number.md

@@ -43,8 +43,8 @@ If specifying a device class, your number entity will need to also return the co
 | `NumberDeviceClass.DATA_RATE` | bit/s, kbit/s, Mbit/s, Gbit/s, B/s, kB/s, MB/s, GB/s, KiB/s, MiB/s, GiB/s | Data rate
 | `NumberDeviceClass.DATA_SIZE` | bit, kbit, Mbit, Gbit, B, kB, MB, GB, TB, PB, EB, ZB, YB, KiB, MiB, GiB, TiB, PiB, EiB, ZiB, YiB | Data size
 | `NumberDeviceClass.DISTANCE` | km, m, cm, mm, mi, yd, in | Generic distance
-| `NumberDeviceClass.ENERGY` | Wh, kWh, MWh, GWh, TWh, MJ, GJ | Energy, this device class should used to represent energy consumption, for example an electricity meter. Represents _power_ over _time_. Not to be confused with `power`.
-| `NumberDeviceClass.ENERGY_STORAGE` | Wh, kWh, MWh, GWh, TWh, MJ, GJ | Stored energy, this device class should be used to represent stored energy, for example the amount of electric energy currently stored in a battery or the capacity of a battery. Represents _power_ over _time_. Not to be confused with `power`.
+| `NumberDeviceClass.ENERGY` | J, kJ, MJ, GJ, mWh, Wh, kWh, MWh, GWh, TWh, cal, kcal, Mcal, Gcal | Energy, this device class should used to represent energy consumption, for example an electricity meter. Represents _power_ over _time_. Not to be confused with `power`.
+| `NumberDeviceClass.ENERGY_STORAGE` | J, kJ, MJ, GJ, mWh, Wh, kWh, MWh, GWh, TWh, cal, kcal, Mcal, Gcal | Stored energy, this device class should be used to represent stored energy, for example the amount of electric energy currently stored in a battery or the capacity of a battery. Represents _power_ over _time_. Not to be confused with `power`.
 | `NumberDeviceClass.FREQUENCY` | Hz, kHz, MHz, GHz | Frequency
 | `NumberDeviceClass.GAS` | m³, ft³, CCF | Volume of gas. Gas consumption measured as energy in kWh instead of a volume should be classified as energy.
 | `NumberDeviceClass.HUMIDITY` | % | Relative humidity

docs/core/entity/sensor.md

@@ -46,8 +46,8 @@ If specifying a device class, your sensor entity will need to also return the co
 | `SensorDeviceClass.DATE` | | Date. Requires `native_value` to be a Python `datetime.date` object, or `None`.
 | `SensorDeviceClass.DISTANCE` | km, m, cm, mm, mi, nmi, yd, in | Generic distance
 | `SensorDeviceClass.DURATION` | d, h, min, s, ms | Time period. Should not update only due to time passing. The device or service needs to give a new data point to update.
-| `SensorDeviceClass.ENERGY` | J, kJ, MJ, GJ, Wh, kWh, MWh, GWh, TWh, cal, kcal, Mcal, Gcal | Energy, this device class should be used for sensors representing energy consumption, for example an electricity meter. Represents _power_ over _time_. Not to be confused with `power`.
-| `SensorDeviceClass.ENERGY_STORAGE` | J, kJ, MJ, GJ, Wh, kWh, MWh, GWh, TWh, cal, kcal, Mcal, Gcal | Stored energy, this device class should be used for sensors representing stored energy, for example the amount of electric energy currently stored in a battery or the capacity of a battery. Represents _power_ over _time_. Not to be confused with `power`.
+| `SensorDeviceClass.ENERGY` | J, kJ, MJ, GJ, mWh, Wh, kWh, MWh, GWh, TWh, cal, kcal, Mcal, Gcal | Energy, this device class should be used for sensors representing energy consumption, for example an electricity meter. Represents _power_ over _time_. Not to be confused with `power`.
+| `SensorDeviceClass.ENERGY_STORAGE` | J, kJ, MJ, GJ, mWh, Wh, kWh, MWh, GWh, TWh, cal, kcal, Mcal, Gcal | Stored energy, this device class should be used for sensors representing stored energy, for example the amount of electric energy currently stored in a battery or the capacity of a battery. Represents _power_ over _time_. Not to be confused with `power`.
 | `SensorDeviceClass.ENUM` | | The sensor has a limited set of (non-numeric) states. The `options` property must be set to a list of possible states when using this device class.
 | `SensorDeviceClass.FREQUENCY` | Hz, kHz, MHz, GHz | Frequency
 | `SensorDeviceClass.GAS` | m³, ft³, CCF | Volume of gas. Gas consumption measured as energy in kWh instead of a volume should be classified as energy.