add last successful login field to column-select for admins/admins overview

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>

lib/tablelisting/admin/tablelisting.admins.php

@@ -95,6 +95,11 @@ return [
 				'class' => 'text-center',
 				'callback' => [Text::class, 'boolean'],
 			],
+			'lastlogin_succ' => [
+				'label' => lng('admin.lastlogin_succ'),
+				'field' => 'lastlogin_succ',
+				'callback' => [Text::class, 'timestamp'],
+			],
 			'theme' => [
 				'label' => lng('panel.theme'),
 				'field' => 'theme',