Add a missing `@since 3.9.0` to the PHPDoc for `wp_register_plugin_realpath()`.

See #16953, #27700.


git-svn-id: https://develop.svn.wordpress.org/trunk@28011 602fd350-edb4-49c9-b593-d223f7449a82
TinyMCE: show an error in the console when a plugin attempts to use the 'wpdialogs' plugin but wpdialog.js is not enqueued, fixes #16284

git-svn-id: https://develop.svn.wordpress.org/trunk@28012 602fd350-edb4-49c9-b593-d223f7449a82
Widget Customizer: Update icons to new Dashicons, part 2.

props Michael Arestad.
fixes #27400.

git-svn-id: https://develop.svn.wordpress.org/trunk@28013 602fd350-edb4-49c9-b593-d223f7449a82
Fix PHPDoc formatting for `WP_Rewrite::add_endpoint()`.

See #27700.


git-svn-id: https://develop.svn.wordpress.org/trunk@28014 602fd350-edb4-49c9-b593-d223f7449a82