[FEATURE] enhance contact label for better UX

Configuration/TCA/tx_sgjobs_domain_model_contact.php

@@ -4,6 +4,8 @@ return [
 	'ctrl' => [
 		'title' => 'LLL:EXT:sg_jobs/Resources/Private/Language/locallang_db.xlf:tx_sgjobs_domain_model_contact',
 		'label' => 'last_name',
+		'label_alt' => 'email, city',
+		'label_alt_force' => 1,
 		'tstamp' => 'tstamp',
 		'crdate' => 'crdate',
 		'cruser_id' => 'cruser_id',