Make all fields editable on the Orders page in the PMPro dashboard

my_pmpro_orders_read_only_fields.php

<?php
/**
 * Make all fields editable on the Orders page in the PMPro dashboard.
 *
 */
function my_pmpro_orders_read_only_fields( $fields ) {
	return array();
}
add_filter( 'pmpro_orders_read_only_fields', 'my_pmpro_orders_read_only_fields' );

This recipe is included in the blog post on "Make All Order Fields Editable in the Memberships > Orders Admin Page." at Paid Memberships Pro here: https://www.paidmembershipspro.com/make-all-order-fields-editable-in-the-memberships-orders-admin-page/