Privacy: Cleanup .wp-policy-help CSS remnants and add back-compat when hiding the tutorial content before copying.

Props garrett-eclipse.
Fixes #49282.

git-svn-id: https://develop.svn.wordpress.org/trunk@47112 602fd350-edb4-49c9-b593-d223f7449a82

src/js/_enqueues/vendor/tinymce/skins/wordpress/wp-content.css

@@ -265,11 +265,6 @@ a[data-wplink-url-error]:before {
 	z-index: -1;
 }
 
-/* Special styling for the suggestes policy text tutorial sections after they have been pasted in the editor. */
-p.wp-policy-help {
-    background-color: #ff0;
-}
-
 /**
  * WP Views
  */

src/wp-admin/css/edit.css

@@ -729,6 +729,7 @@ form#tags-filter {
 	margin-top: 6px;
 }
 
+.hide-privacy-policy-tutorial .wp-policy-help, /* For back-compat see #49282 */
 .hide-privacy-policy-tutorial .privacy-policy-tutorial {
 	visibility: hidden;
 }
@@ -737,6 +738,7 @@ form#tags-filter {
 	font-style: italic;
 }
 
+.wp-suggested-text p.wp-policy-help, /* For back-compat see #49282 */
 .wp-suggested-text p.privacy-policy-tutorial {
 	font-style: normal;
 }

src/wp-admin/includes/plugin.php

@@ -2257,6 +2257,11 @@ function plugin_sandbox_scrape( $plugin ) {
  * For more information see the Plugin Handbook:
  * https://developer.wordpress.org/plugins/privacy/suggesting-text-for-the-site-privacy-policy/.
  *
+ * The HTML contents of the `$policy_text` supports use of a specialized `privacy-policy-tutorial` css class 
+ * which can be used to provide supplemental information. Any content contained within html elements 
+ * that have the `privacy-policy-tutorial` css class applied will be omitted from the clipboard 
+ * when the section content is copied.
+ *
  * Intended for use with the `'admin_init'` action.
  *
  * @since 4.9.6