Customize: Skip triggering initial click on pages section for available nav menu items if already open.

Fixes race condition if user opens Pages section before the ajax request to load items finishes.

Props ryankienstra, celloexpressions.
Fixes #36984.

Built from https://develop.svn.wordpress.org/trunk@38807


git-svn-id: http://core.svn.wordpress.org/trunk@38750 1a063a9b-81f0-0310-95a4-ce76da25c4cd

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

@@ -397,7 +397,7 @@
 					}
 					self.pages[ type + ':' + object ] = -1;
 					return;
-				} else if ( 'page' === object ) {
+				} else if ( ( 'page' === object ) && ( ! availableMenuItemContainer.hasClass( 'open' ) ) ) {
 					availableMenuItemContainer.find( '.accordion-section-title > button' ).click();
 				}
 				items = new api.Menus.AvailableItemCollection( items ); // @todo Why is this collection created and then thrown away?

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38806';
+$wp_version = '4.7-alpha-38807';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.