Node union of the flat picker list across both dialects — the one
type a consumer's zone picker speaks; the model tags
(buildings/floors/areas/devices,
homeBuildings/homeDevices) discriminate, and the consumer's
option-value convention stays <model>_<id>, split at the FIRST
underscore (a Home id may itself contain underscores).
Node union of the flat picker list across both dialects — the one type a consumer's zone picker speaks; the
modeltags (buildings/floors/areas/devices,homeBuildings/homeDevices) discriminate, and the consumer's option-value convention stays<model>_<id>, split at the FIRST underscore (a Home id may itself contain underscores).