Use commerce_product_availability_get_availability_status_options() for add to cart button altering

Please review! A few unrelated changes, hope that is fine!

Great, as just discussed we should keep

        switch ($availability_status) {
          case 'in_stock':
            $form['actions']['submit']['#value'] = new TranslatableMarkup('Unavailable');
            break;

as the only special case for now!

I hope this gives us and others a bit more flexibility.

BTW, if we need even more flexibility, we could add a "$context" variable to the function and alter hook! So users could differentiate. Perhaps add this idea as comment in the function, so we remember it, if needed?

BTW, if we need even more flexibility, we could add a "$context" variable to the function and alter hook

I'd say we create a minor issue for that if possible.

@grevil: Reopen to add that comment hint from #5 to the code by time...

Done.

Automatically closed - issue fixed for 2 weeks with no activity.