Menu: Remove close delay for keyboard interaction to fix an issue with properly adding and removing ui-state-active class during quick navigation through submenus

Author: kborchers

ui/jquery.ui.menu.js

@@ -330,9 +330,13 @@ $.widget( "ui.menu", {
 		// highlight active parent menu item, if any
 		this.active.parent().closest( ".ui-menu-item" ).children( "a:first" ).addClass( "ui-state-active" );
 
-		this.timer = this._delay(function() {
-			this._close();
-		}, this.delay );
+		if ( event.type === "keydown" ) {
+            this._close();
+        } else {
+            this.timer = this._delay(function() {
+				this._close();
+			}, this.delay );
+        }
 
 		nested = $( "> .ui-menu", item );
 		if ( nested.length && ( /^mouse/.test( event.type ) ) ) {