This shows green until the bar is at 50%, yellow until 33%, and red
below that.
This also fixes the bar to show white when "colored" is disabled in the
config.
I'd ultimately like to get this to a nicer UI, but I need some more time to get that work done and/or to find somebody who knows what they're doing better than I do.
This is made to be used with touch screens, so no mouse cursor is necessary and we don't need the button focus staying highlighted since they're just toggle switches.
This can be used with a touch screen, for example. I've also stubbed in functionality for controlling lights, heaters, and heat setpoints, but no actual UI exists for anything other than turning circuits on and off for now. That stuff is coming soon.
