--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/customize/class-wp-customize-nav-menus-panel.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,101 @@
+<?php
+/**
+ * Customize API: WP_Customize_Nav_Menus_Panel class
+ *
+ * @package WordPress
+ * @subpackage Customize
+ * @since 4.4.0
+ */
+
+/**
+ * Customize Nav Menus Panel Class
+ *
+ * Needed to add screen options.
+ *
+ * @since 4.3.0
+ *
+ * @see WP_Customize_Panel
+ */
+class WP_Customize_Nav_Menus_Panel extends WP_Customize_Panel {
+
+	/**
+	 * Control type.
+	 *
+	 * @since 4.3.0
+	 * @var string
+	 */
+	public $type = 'nav_menus';
+
+	/**
+	 * Render screen options for Menus.
+	 *
+	 * @since 4.3.0
+	 */
+	public function render_screen_options() {
+		// Adds the screen options.
+		require_once ABSPATH . 'wp-admin/includes/nav-menu.php';
+		add_filter( 'manage_nav-menus_columns', 'wp_nav_menu_manage_columns' );
+
+		// Display screen options.
+		$screen = WP_Screen::get( 'nav-menus.php' );
+		$screen->render_screen_options( array( 'wrap' => false ) );
+	}
+
+	/**
+	 * Returns the advanced options for the nav menus page.
+	 *
+	 * Link title attribute added as it's a relatively advanced concept for new users.
+	 *
+	 * @since 4.3.0
+	 * @deprecated 4.5.0 Deprecated in favor of wp_nav_menu_manage_columns().
+	 */
+	public function wp_nav_menu_manage_columns() {
+		_deprecated_function( __METHOD__, '4.5.0', 'wp_nav_menu_manage_columns' );
+		require_once ABSPATH . 'wp-admin/includes/nav-menu.php';
+		return wp_nav_menu_manage_columns();
+	}
+
+	/**
+	 * An Underscore (JS) template for this panel's content (but not its container).
+	 *
+	 * Class variables for this panel class are available in the `data` JS object;
+	 * export custom variables by overriding WP_Customize_Panel::json().
+	 *
+	 * @since 4.3.0
+	 *
+	 * @see WP_Customize_Panel::print_template()
+	 */
+	protected function content_template() {
+		?>
+		<li class="panel-meta customize-info accordion-section <# if ( ! data.description ) { #> cannot-expand<# } #>">
+			<button type="button" class="customize-panel-back" tabindex="-1">
+				<span class="screen-reader-text"><?php _e( 'Back' ); ?></span>
+			</button>
+			<div class="accordion-section-title">
+				<span class="preview-notice">
+					<?php
+					/* translators: %s: the site/panel title in the Customizer */
+					printf( __( 'You are customizing %s' ), '<strong class="panel-title">{{ data.title }}</strong>' );
+					?>
+				</span>
+				<button type="button" class="customize-help-toggle dashicons dashicons-editor-help" aria-expanded="false">
+					<span class="screen-reader-text"><?php _e( 'Help' ); ?></span>
+				</button>
+				<button type="button" class="customize-screen-options-toggle" aria-expanded="false">
+					<span class="screen-reader-text"><?php _e( 'Menu Options' ); ?></span>
+				</button>
+			</div>
+			<# if ( data.description ) { #>
+			<div class="description customize-panel-description">{{{ data.description }}}</div>
+			<# } #>
+			<div id="screen-options-wrap">
+				<?php $this->render_screen_options(); ?>
+			</div>
+		</li>
+		<?php
+		// NOTE: The following is a workaround for an inability to treat (and thus label) a list of sections as a whole.
+		?>
+		<li class="customize-control-title customize-section-title-nav_menus-heading"><?php _e( 'Menus' ); ?></li>
+	<?php
+	}
+}