Fixing some JS notices when working with the tax table

assets/js/admin/settings-views-html-settings-tax.js

@@ -190,11 +190,11 @@
 						} ),
 						$current, current_id, current_order, rates_to_reorder, reordered_rates;
 
-					event.preventDefault();
+					$current = $tbody.children( '.current' );
 
-					if ( $current = $tbody.children( '.current' ) ) {
-						current_id    = $current.last().data( 'id' );
-						current_order = parseInt( rates[ current_id ].tax_rate_order, 10 );
+					if ( $current.length ) {
+						current_id            = $current.last().data( 'id' );
+						current_order         = parseInt( rates[ current_id ].tax_rate_order, 10 );
 						newRow.tax_rate_order = 1 + current_order;
 
 						rates_to_reorder = _.filter( rates, function( rate ) {

assets/js/admin/woocommerce_admin.js

@@ -147,7 +147,7 @@ jQuery( function ( $ ) {
 				$this_row.addClass( 'selected_now' ).addClass( 'current' );
 
 				if ( $( 'tr.last_selected', $this_table ).size() > 0 ) {
-					if ( $this_row.index() > $( 'tr.last_selected, $this_table' ).index() ) {
+					if ( $this_row.index() > $( 'tr.last_selected', $this_table ).index() ) {
 						$( 'tr', $this_table ).slice( $( 'tr.last_selected', $this_table ).index(), $this_row.index() ).addClass( 'current' );
 					} else {
 						$( 'tr', $this_table ).slice( $this_row.index(), $( 'tr.last_selected', $this_table ).index() + 1 ).addClass( 'current' );