Fix wrong order of categories

Author: BurntimeX

wcfsetup/install/files/lib/system/cache/eager/CategoryCache.class.php

@@ -25,6 +25,7 @@ protected function getCacheData(): CategoryCacheData
         $categoryList->sqlJoins = "
             LEFT JOIN wcf1_object_type object_type
             ON        object_type.objectTypeID = category.objectTypeID";
+        $categoryList->sqlOrderBy = "category.showOrder";
         $categoryList->readObjects();
 
         $objectTypeCategoryIDs = [];