The inList constraint doesn't generate a select for an integer field in the domain class

When we have an integer field in a domain class, and that we're adding an inList constraint, an input type is generated in the view, instead of a select.

For instance, if you have a field

Integer numberOfProcessors

and you add in the constraints

numberOfProcessors(inList: [1,2,4,8])

an input type in used as the widget, instead of a select.

However, of course, when submitting the form, the number is validated appropriately. So, if I enter 3, I get a validation error.

The thing we just need here is a select widget instead of an input type.