temporal date inputs on iOS not aligned if inside of .input-group-lg
Created by: niftylettuce
currently the CSS rule is here https://github.com/twbs/bootstrap/blob/10e9fef85c6afde2b3804df928d9351b0f110a6c/less/forms.less#L184-L189
we need to account for if the input
is nested inside of an .input-group-lg
or .input-group-sm