Menu: Remove display property on hidden submenus instead of setting display:block. Surfaced by domEqual now checking for style property (see d687a1b).

Author: jzaefferer

ui/jquery.ui.menu.js

@@ -148,7 +148,9 @@ $.widget( "ui.menu", {
 				.removeAttr( "aria-hidden" )
 				.removeAttr( "aria-disabled" )
 				.removeUniqueId()
-				.show();
+				.css({
+					display: ""
+				});
 
 		// Destroy menu items
 		this.element.find( ".ui-menu-item" )