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diff --git a/wp-includes/js/jquery/ui/effect-drop.js b/wp-includes/js/jquery/ui/effect-drop.js
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+/*!
+ * jQuery UI Effects Drop 1.13.2
+ * http://jqueryui.com
+ *
+ * Copyright jQuery Foundation and other contributors
+ * Released under the MIT license.
+ * http://jquery.org/license
+ */
+
+//>>label: Drop Effect
+//>>group: Effects
+//>>description: Moves an element in one direction and hides it at the same time.
+//>>docs: http://api.jqueryui.com/drop-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( "drop", "hide", function( options, done ) {
+
+	var distance,
+		element = $( this ),
+		mode = options.mode,
+		show = mode === "show",
+		direction = options.direction || "left",
+		ref = ( direction === "up" || direction === "down" ) ? "top" : "left",
+		motion = ( direction === "up" || direction === "left" ) ? "-=" : "+=",
+		oppositeMotion = ( motion === "+=" ) ? "-=" : "+=",
+		animation = {
+			opacity: 0
+		};
+
+	$.effects.createPlaceholder( element );
+
+	distance = options.distance ||
+		element[ ref === "top" ? "outerHeight" : "outerWidth" ]( true ) / 2;
+
+	animation[ ref ] = motion + distance;
+
+	if ( show ) {
+		element.css( animation );
+
+		animation[ ref ] = oppositeMotion + distance;
+		animation.opacity = 1;
+	}
+
+	// Animate
+	element.animate( animation, {
+		queue: false,
+		duration: options.duration,
+		easing: options.easing,
+		complete: done
+	} );
+} );
+
+} );