Stepped fan to use slider setting
Hi Merdok, 

I created this issue before on the Mi fan plugin, which I currently use on the 1.3.1 version, but I would like to ask you to consider this again.

For fans with multiple steps, the are now toggles created for each fan speed. I think it would make more sense to use the old behaviour to have a slider that automatically adjusts to the closest value possible.
I understand that the current implementation is better from a technical standpoint but when using the Home app the old implementation just works way better. Could you add a toggle in the settings to use the slider behaviour?

Again, thank you for this excellent plugin!
Stijn