[BUGFIX] Add the slug field to category pages

Configuration/TCA/Overrides/pages.php

@@ -92,7 +92,7 @@ call_user_func(
 		$GLOBALS['TCA'][$table]['types'][\SGalinski\SgNews\Utility\BackendNewsUtility::CATEGORY_DOKTYPE] = [
 			'showitem' => '--div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:general,
 					--palette--;;standard,
-					title, tx_realurl_pathsegment, tx_realurl_exclude,
+					title, slug, tx_realurl_pathsegment, tx_realurl_exclude,
 				--div--;' . $localLangDbPath . $table . '.tabs.images,
 					tx_sgnews_teaser2_image, tx_sgnews_teaser1_image,
 				--div--;LLL:EXT:frontend/Resources/Private/Language/locallang_tca.xlf:' . $table . '.tabs.metadata,