[TASK] Register codeblock icon as typeicon for the CType

Author: o-ba

Configuration/TCA/Overrides/tt_content.php

@@ -9,6 +9,8 @@
         'after'
     );
 
+    $GLOBALS['TCA']['tt_content']['ctrl']['typeicon_classes']['codeblock'] = 'content-codeblock';
+
     $GLOBALS['TCA']['tt_content']['types']['codeblock'] = [
         'showitem' => '
                 --div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:general,

ext_localconf.php

@@ -1,5 +1,5 @@
 <?php
-defined('TYPO3_MODE') or die();
+defined('TYPO3') or die();
 
 call_user_func(static function () {
     $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['cms/layout/class.tx_cms_layout.php']['tt_content_drawItem']['codeblock'] =