Phone number input

The button element (mc-phone-number__button) must always have an id, a aria-haspopup, aria-labelledby and the type="button" attribute.

The list element (mc-phone-number__list) must always have a role="list" or role="listbox" attribute.

Each list element must have the role="option"

Add the aria-selected="true" attribute to the selected list element.