Coupons price input doesn't account for limit of decimals in store settings

[iamgabrielma]

When creating coupons, it's possible to add more decimals than the limit set under Settings > General:

If we compare it with the input field for Custom Amounts, this will disallow the merchant to input more than n digits in the UI (eg, will only allow for 2 decimals if Number of decimals = 2 )