Support required attribute when in form

[Confidenceman02]

The variants don't support the required attribute.

This becomes a problem when they exist inside native forms and the behavior expected is that we get a native prompt asking the user to fill in the input.

We are already including a hidden input to work with form submits so the trick will be to position the input in a spot where the native prompt ends up rendering under the select control.

Will also need to make sure the input is not sequentially focusable.

https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/tabindex?retiredLocale=nl