Merged revision(s) 42576 from trunk:

TinyMCE: backport bug fixes to `NotificationManager` and `WindowManager` from d1877933fa (diff-2e5c98d81ce2481aa1042b2320728b65) and to `MultiRange` from 250675bb7b.

Props peterwilsoncc, azaozz.
Fixes #42722 for 4.9.3, see #43012.

Built from https://develop.svn.wordpress.org/branches/4.9@42577


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42406 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9.3-alpha-42575';
+$wp_version = '4.9.3-alpha-42577';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
@@ -18,7 +18,7 @@ $wp_db_version = 38590;
  *
  * @global string $tinymce_version
  */
-$tinymce_version = '4607-20171116';
+$tinymce_version = '4607-20180123';
 
 /**
  * Holds the required PHP version