I'm developing a site that uses sub-domains for particular pages.
I've used the "Use this page as the 'home page' for the following domains:" field to enter URIs such as subdomain.website.com.
I'd like it so that when the user creates a link to one of these pages, the editor inserts the URI from this field.
I think if it's at all possible, the change would need to be in sapphire/forms/TreeDropdownField.php, but I'm not sure.
Has anyone had experience doing this? Or can someone point me in that right direction?