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diff --git a/vendor/oojs/oojs-ui/src/layouts/PageLayout.js b/vendor/oojs/oojs-ui/src/layouts/PageLayout.js
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+/**
+ * PageLayouts are used within {@link OO.ui.BookletLayout booklet layouts} to create pages that users can select and display
+ * from the booklet's optional {@link OO.ui.OutlineSelectWidget outline} navigation. Pages are usually not instantiated directly,
+ * rather extended to include the required content and functionality.
+ *
+ * Each page must have a unique symbolic name, which is passed to the constructor. In addition, the page's outline
+ * item is customized (with a label, outline level, etc.) using the #setupOutlineItem method. See
+ * {@link OO.ui.BookletLayout BookletLayout} for an example.
+ *
+ * @class
+ * @extends OO.ui.PanelLayout
+ *
+ * @constructor
+ * @param {string} name Unique symbolic name of page
+ * @param {Object} [config] Configuration options
+ */
+OO.ui.PageLayout = function OoUiPageLayout( name, config ) {
+	// Allow passing positional parameters inside the config object
+	if ( OO.isPlainObject( name ) && config === undefined ) {
+		config = name;
+		name = config.name;
+	}
+
+	// Configuration initialization
+	config = $.extend( { scrollable: true }, config );
+
+	// Parent constructor
+	OO.ui.PageLayout.super.call( this, config );
+
+	// Properties
+	this.name = name;
+	this.outlineItem = null;
+	this.active = false;
+
+	// Initialization
+	this.$element.addClass( 'oo-ui-pageLayout' );
+};
+
+/* Setup */
+
+OO.inheritClass( OO.ui.PageLayout, OO.ui.PanelLayout );
+
+/* Events */
+
+/**
+ * An 'active' event is emitted when the page becomes active. Pages become active when they are
+ * shown in a booklet layout that is configured to display only one page at a time.
+ *
+ * @event active
+ * @param {boolean} active Page is active
+ */
+
+/* Methods */
+
+/**
+ * Get the symbolic name of the page.
+ *
+ * @return {string} Symbolic name of page
+ */
+OO.ui.PageLayout.prototype.getName = function () {
+	return this.name;
+};
+
+/**
+ * Check if page is active.
+ *
+ * Pages become active when they are shown in a {@link OO.ui.BookletLayout booklet layout} that is configured to display
+ * only one page at a time. Additional CSS is applied to the page's outline item to reflect the active state.
+ *
+ * @return {boolean} Page is active
+ */
+OO.ui.PageLayout.prototype.isActive = function () {
+	return this.active;
+};
+
+/**
+ * Get outline item.
+ *
+ * The outline item allows users to access the page from the booklet's outline
+ * navigation. The outline item itself can be customized (with a label, level, etc.) using the #setupOutlineItem method.
+ *
+ * @return {OO.ui.OutlineOptionWidget|null} Outline option widget
+ */
+OO.ui.PageLayout.prototype.getOutlineItem = function () {
+	return this.outlineItem;
+};
+
+/**
+ * Set or unset the outline item.
+ *
+ * Specify an {@link OO.ui.OutlineOptionWidget outline option} to set it,
+ * or `null` to clear the outline item. To customize the outline item itself (e.g., to set a label or outline
+ * level), use #setupOutlineItem instead of this method.
+ *
+ * @param {OO.ui.OutlineOptionWidget|null} outlineItem Outline option widget, null to clear
+ * @chainable
+ */
+OO.ui.PageLayout.prototype.setOutlineItem = function ( outlineItem ) {
+	this.outlineItem = outlineItem || null;
+	if ( outlineItem ) {
+		this.setupOutlineItem();
+	}
+	return this;
+};
+
+/**
+ * Set up the outline item.
+ *
+ * Use this method to customize the outline item (e.g., to add a label or outline level). To set or unset
+ * the outline item itself (with an {@link OO.ui.OutlineOptionWidget outline option} or `null`), use
+ * the #setOutlineItem method instead.
+ *
+ * @param {OO.ui.OutlineOptionWidget} outlineItem Outline option widget to set up
+ * @chainable
+ */
+OO.ui.PageLayout.prototype.setupOutlineItem = function () {
+	return this;
+};
+
+/**
+ * Set the page to its 'active' state.
+ *
+ * Pages become active when they are shown in a booklet layout that is configured to display only one page at a time. Additional
+ * CSS is applied to the outline item to reflect the page's active state. Outside of the booklet
+ * context, setting the active state on a page does nothing.
+ *
+ * @param {boolean} value Page is active
+ * @fires active
+ */
+OO.ui.PageLayout.prototype.setActive = function ( active ) {
+	active = !!active;
+
+	if ( active !== this.active ) {
+		this.active = active;
+		this.$element.toggleClass( 'oo-ui-pageLayout-active', active );
+		this.emit( 'active', this.active );
+	}
+};