In Drupal 8.5, when you're adding a menu item, you can add a telephone number by setting the Link to tel:1-555-555-5555
.
However, if you try to add an SMS link like sms:1-555-555-5555
, it fails validation and says "The path 'sms:1-555-555-5555` is invalid."
What's the easiest way to override this so that I can add an sms link to the menu?