Use attributes orderby options to sort terms in product's edit screen

includes/admin/meta-boxes/views/html-product-attribute.php

@@ -40,7 +40,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 								<select multiple="multiple" data-placeholder="<?php esc_attr_e( 'Select terms', 'woocommerce' ); ?>" class="multiselect attribute_values wc-enhanced-select" name="attribute_values[<?php echo esc_attr( $i ); ?>][]">
 									<?php
 									$args      = array(
-										'orderby'    => 'name',
+										'orderby'    => ! empty( $attribute_taxonomy->attribute_orderby ) ? $attribute_taxonomy->attribute_orderby : 'name',
 										'hide_empty' => 0,
 									);
 									$all_terms = get_terms( $attribute->get_taxonomy(), apply_filters( 'woocommerce_product_attribute_terms', $args ) );