Add ability to apply one WC product variation price to all variations of the same product

gistfile1.php

<?php

	add_action( 'woocommerce_product_data_panels', 'gowp_global_variation_price' );
        function gowp_global_variation_price() {
                ?>
                        <script type="text/javascript">
                                jQuery( document ).ready( function() {
                                        a = jQuery( '<a href="#">Apply to all Variations</a>' );
                                        b = jQuery( 'input[name^="variable_regular_price"]' );
                                        a.click( function( c ) {
                                                d = b.val();
                                                e = confirm( "Change the price of all variations to " + d + "?" );
                                                if ( e ) b.val( d ); 
                                                c.preventDefault();
                                       	} );
                                        b.prev( 'label' ).append( " " ).append( a );
                                } );
                        </script>
                <?php
        }