Adds right sorting in the FE

Configuration/TCA/tx_typo3roadmap_domain_model_majorversion.php

@@ -165,6 +165,7 @@ return array(
                 'type'           => 'inline',
                 'foreign_table'  => 'tx_typo3roadmap_domain_model_minorversion',
                 'foreign_field'  => 'major_version',
+                'foreign_sortby' => 'sorting',
                 'appearance'     => array(
                     'useSortable' => true,
                     'collapseAll' => true,