change button size responsively

[JacobZwang]

Is your feature request related to a problem? Please describe.
It's common for buttons to be smaller on desktop than on mobile, yet we can't set the size property on buttons based on screen size.

Describe the solution you'd like
Allow changing size of buttons responsively like <Button size={{md: "sm"}}></Button>.

Describe alternatives you've considered
Manually styling button to be different on mobile.

Additional context
Should you be able to adjust all properties responsively even if they are tied to javascript values and not purely css?