KSES: Allow position-related CSS properties.

Adds support for the following CSS properties considered safe for inline CSS:
* `position`
* `top`
* `right`
* `bottom`
* `left`
* `z-index`

References:
* [https://github.com/WordPress/gutenberg/pull/46142 Gutenberg PR 46142].

Follow-up to [54117].

Props andrewserong, mukesh27.
Fixes #57504.
Built from https://develop.svn.wordpress.org/trunk@55184


git-svn-id: http://core.svn.wordpress.org/trunk@54717 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-alpha-55183';
+$wp_version = '6.2-alpha-55184';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.