Nav Menus: In `Walker_Nav_Menu_Edit::start_el()` initialize `$original_title` with `false`.

Prevents displaying "Original:" without a title when adding a menu item without a title.

Props grapplerulrich, swissspidy.
Fixes #36729.
Built from https://develop.svn.wordpress.org/trunk@37953


git-svn-id: http://core.svn.wordpress.org/trunk@37894 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-walker-nav-menu-edit.php

@@ -70,7 +70,7 @@ class Walker_Nav_Menu_Edit extends Walker_Nav_Menu {
 			'_wpnonce',
 		);
 
-		$original_title = '';
+		$original_title = false;
 		if ( 'taxonomy' == $item->type ) {
 			$original_title = get_term_field( 'name', $item->object_id, $item->object, 'raw' );
 			if ( is_wp_error( $original_title ) )

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6-beta1-37952';
+$wp_version = '4.6-beta1-37953';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.