Allow props to be passed down to native select in FormSelect component

[cg-mmirca]

Is your feature request related to a problem? Please describe.
I want to use the HTML disabled property for the native select rendered by FormSelect.

Describe the solution you'd like
I would like to have a property similar to inputProps found at the FormInput. This would allow me to pass down all the properties I need to the native select element.

Describe alternatives you've considered
We could do a querySelector to obtain the HTML reference but I would be React-friendly.

Additional context
A suggestion would be to add "selectProps" property to the FormSelect component.

[daniele-zurico]

closed by #444