FR Make the Mini graph card compatible with climate entities

[Nickduino]

The History graph card is compatible with climate entities. It will graph the current temp, the target temp and the heating periods (the vertical bars):

It would be really sweet to be able to do that with the Mini graph card without having to template a sensor for each value for every climate entity (if you have IoT thermostatic valves at every radiator, that's tens of sensors to template)