Add "generic" services to services dropdown.

[cgiesche]

Lights do not (any more) offer domain specific services to turn them on or off. They rely on generic services that are available for entities of all domains:

homeassistant.turn_on - Turns on an entity (that supports being turned on), for example an automation, switch, etc.
homeassistant.turn_off - Turns off an entity (that supports being turned off), for example an automation, switch, etc.
homeassistant.toggle - Turns off an entity that is on, or turns on an entity that is off (that supports being turned on and off)
homeassistant.update_entity - Request the update of an entity, rather than waiting for the next scheduled update, for example Google travel time sensor, a template sensor, or a light

Add those services to every entity.

[cgiesche]

Never mind. No bug, just me being stupid.