Convert product categories widget to use selectWoo.

includes/wc-term-functions.php

@@ -201,6 +201,30 @@ function wc_product_dropdown_categories( $args = array() ) {
 		$args['orderby']    = 'name';
 	}
 
+	wp_enqueue_script( 'selectWoo' );
+	wp_enqueue_style( 'select2' );
+
+	wc_enqueue_js(
+		"
+			if ( jQuery().selectWoo ) {
+				var wc_product_cat_select = function() {
+					jQuery( '.dropdown_product_cat' ).selectWoo( {
+						placeholder: '" . esc_js( __( 'Select a category', 'woocommerce' ) ) . "',
+						minimumResultsForSearch: 5,
+						width: '100%',
+						allowClear: true,
+						language: {
+							noResults: function() {
+								return '" . esc_js( _x( 'No matches found', 'enhanced select', 'woocommerce' ) ) . "';
+							}
+						}
+					} );
+				};
+				wc_product_cat_select();
+			}
+		"
+	);
+
 	wp_dropdown_categories( $args );
 }