Add heating, cooling status to conical fermenter graph#263

I’d love to see on the tracking graph of the conical fermenter app interface when the heating and cooling is on and when it’s in tracking mode. I’d find this additional information very interesting and useful so you can see over a fermentation how often the system calls for either cooling or heating and how long it stays in tracking mode.

+1, would be usefull to help with setting hysteresis better, especially useful with chiller.