Merge branch '3' into 4

Author: github-actions[bot]

lang/en.yml

@@ -1,5 +1,6 @@
 en:
   SilverStripe\IFrame\IFramePage:
+    CLASS_DESCRIPTION: 'Embeds an iframe into the body of the page.'
     DESCRIPTION: 'Embeds an iframe into the body of the page.'
     ExternalNote: 'Please note the following section of content is possibly being delivered from an external source (IFRAME in HTML terms), and may present unusual experiences for screen readers.'
     Loading: 'Loading content...'

src/IFramePage.php

@@ -38,8 +38,13 @@ class IFramePage extends Page
 
     private static $table_name = 'IFramePage';
 
+    /**
+     * @deprecated 5.4.0 use class_description instead.
+     */
     private static $description = 'Embeds an iframe into the body of the page.';
 
+    private static $class_description = 'Embeds an iframe into the body of the page.';
+
     private static $singular_name = 'IFrame Page';
 
     public function getCMSFields()