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LightEntity no longer supports white_value, it's replaced by
color mode white.
Light's white_value was deprecated in Home Assistant Core 2021.4 by
PR #47720
and replaced by color mode white in Home Assistant Core 2021.7 by
PR #51411.
The primary reason for introducing light color modes was that a light's state should not be ambiguous.
Light entities are now required to set the supported_color_modes and color_mode properties, and a warning will be logged asking users to report an issue if that's not done.
User profile advanced mode is going away, which means integrations can no longer check if advanced mode is enabled or not in data entry flows.
Home Assistant's MQTT integration no longer supports deprecated callback signatures for MQTT subscribe.
