Allow max of 15 products in Recent Viewed Products widget

includes/wc-product-functions.php

@@ -484,7 +484,7 @@ function wc_track_product_view() {
 		$viewed_products = (array) explode( '|', $_COOKIE['woocommerce_recently_viewed'] );
 	}
 
-	// Unset if already in viewed products list and append ID.
+	// Unset if already in viewed products list.
 	$keys = array_flip( $viewed_products );
 	if ( isset( $keys[ $post->ID ] ) ) {
 		unset( $viewed_products[ $keys[ $post->ID ] ] );

includes/widgets/class-wc-widget-recently-viewed.php

@@ -33,7 +33,7 @@ class WC_Widget_Recently_Viewed extends WC_Widget {
 				'type'  => 'number',
 				'step'  => 1,
 				'min'   => 1,
-				'max'   => '',
+				'max'   => 15,
 				'std'   => 10,
 				'label' => __( 'Number of products to show', 'woocommerce' ),
 			),