Options to hide AC button and centralize zero

[EricMGVS]

I would love to see an option to hide the AC button, since in every calculator app I always tap the AC button accidentally and end up losing all the calculation I was making at the moment.

Also, it would be nice to have an option to centralize the zero button, swapping it with the decimal separator in the bottom left, since people like me that are coming from other calculator apps that have this behavior don't get confused.

Thanks in advance!