Multisite: Display registered `new_item` text for `post` post type in My Sites menu.

Previously, the My Sites menu would show "New Post" even if the `post` post type labels had been filtered to different values.

Props nahuelmahe.
Fixes #44794.

Built from https://develop.svn.wordpress.org/trunk@43590


git-svn-id: http://core.svn.wordpress.org/trunk@43419 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/admin-bar.php

@@ -613,7 +613,7 @@ function wp_admin_bar_my_sites_menu( $wp_admin_bar ) {
 				array(
 					'parent' => $menu_id,
 					'id'     => $menu_id . '-n',
-					'title'  => __( 'New Post' ),
+					'title'  => get_post_type_object( 'post' )->labels->new_item,
 					'href'   => admin_url( 'post-new.php' ),
 				)
 			);

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-43589';
+$wp_version = '5.0-alpha-43590';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.