Customizer: Don't add a menu item twice when using the keyboard.

Buttons don't need keyboard events, they natively support keyboard interaction and they just need a click event.

fixes #32665.
Built from https://develop.svn.wordpress.org/trunk@32890


git-svn-id: http://core.svn.wordpress.org/trunk@32861 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/customize-nav-menus.js

@@ -101,7 +101,6 @@
 			'click #menu-items-search': 'debounceSearch',
 			'focus .menu-item-tpl': 'focus',
 			'click .menu-item-tpl': '_submit',
-			'keypress .menu-item-tpl': '_submit',
 			'click #custom-menu-item-submit': '_submitLink',
 			'keypress #custom-menu-item-name': '_submitLink',
 			'keydown': 'keyboardAccessible'

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-alpha-32889';
+$wp_version = '4.3-alpha-32890';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.