Add Support for Dim to Warm Bulbs

[maniscalcojohn]

I've had a lot of reliability problems with the tunable wifi bulbs. I found bulbs that allow you to adjust the color temperature with a traditional smart dimmer, which means I no longer have to rely on wifi. They work great, except the adaptive-lighting curve doesn't quite work right. Additionally, when the dimmer is set to a specific percentage, the bulbs flicker between warm and cool. A good way to support these would be to input the percentage where the cool/warm transition takes place (which adaptive lighting should avoid), and you could set two different curves on either side of the transition.

Ecosmart DuoBright Bulbs