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diff --git a/wp-includes/js/jquery/ui/effect-fold.js b/wp-includes/js/jquery/ui/effect-fold.js
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+/*!
+ * jQuery UI Effects Fold 1.13.2
+ * http://jqueryui.com
+ *
+ * Copyright jQuery Foundation and other contributors
+ * Released under the MIT license.
+ * http://jquery.org/license
+ */
+
+//>>label: Fold Effect
+//>>group: Effects
+//>>description: Folds an element first horizontally and then vertically.
+//>>docs: http://api.jqueryui.com/fold-effect/
+//>>demos: http://jqueryui.com/effect/
+
+( function( factory ) {
+	"use strict";
+
+	if ( typeof define === "function" && define.amd ) {
+
+		// AMD. Register as an anonymous module.
+		define( [
+			"jquery",
+			"./effect"
+		], factory );
+	} else {
+
+		// Browser globals
+		factory( jQuery );
+	}
+} )( function( $ ) {
+"use strict";
+
+return $.effects.define( "fold", "hide", function( options, done ) {
+
+	// Create element
+	var element = $( this ),
+		mode = options.mode,
+		show = mode === "show",
+		hide = mode === "hide",
+		size = options.size || 15,
+		percent = /([0-9]+)%/.exec( size ),
+		horizFirst = !!options.horizFirst,
+		ref = horizFirst ? [ "right", "bottom" ] : [ "bottom", "right" ],
+		duration = options.duration / 2,
+
+		placeholder = $.effects.createPlaceholder( element ),
+
+		start = element.cssClip(),
+		animation1 = { clip: $.extend( {}, start ) },
+		animation2 = { clip: $.extend( {}, start ) },
+
+		distance = [ start[ ref[ 0 ] ], start[ ref[ 1 ] ] ],
+
+		queuelen = element.queue().length;
+
+	if ( percent ) {
+		size = parseInt( percent[ 1 ], 10 ) / 100 * distance[ hide ? 0 : 1 ];
+	}
+	animation1.clip[ ref[ 0 ] ] = size;
+	animation2.clip[ ref[ 0 ] ] = size;
+	animation2.clip[ ref[ 1 ] ] = 0;
+
+	if ( show ) {
+		element.cssClip( animation2.clip );
+		if ( placeholder ) {
+			placeholder.css( $.effects.clipToBox( animation2 ) );
+		}
+
+		animation2.clip = start;
+	}
+
+	// Animate
+	element
+		.queue( function( next ) {
+			if ( placeholder ) {
+				placeholder
+					.animate( $.effects.clipToBox( animation1 ), duration, options.easing )
+					.animate( $.effects.clipToBox( animation2 ), duration, options.easing );
+			}
+
+			next();
+		} )
+		.animate( animation1, duration, options.easing )
+		.animate( animation2, duration, options.easing )
+		.queue( done );
+
+	$.effects.unshift( element, queuelen, 4 );
+} );
+
+} );