Optional Percentage Set

[FotisSp]

Hello and thanks for the great card!

I currently have a Xiaomi Smart Air Purifier 4 Lite but this one does not support percentage set of the fan. This is causing an infinite load on the card every time i trigger a button from the card or if I click the percentage set from the card.
As show in the image the percentage is always in the bottom left of the overlay.

Maybe a possible solution would be to have a flag so we can disable this percentage overlay in the card.
Another possible solution could be to have to set a maximum RPM value and then it is automatically calculates the percentage based on the current RPMs. e.g. if the purifier can reach 2800RPMs then if it is working on 1400RPMs currently the overlay will show 50%.

I can provide maybe further info or help if needed in order to make it work. A possible way maybe to test it would be if you disable the percentage entity of your purifier from the HA and check if you have the same issue as me.

Again thanks for the great card!