refs #1657 language text

resources/lang/en-GB/search_string.php

@@ -4,6 +4,12 @@ return [
 
     'columns' => [
         'last_logged_in_at' => 'Last Login',
+        'paid_at'           => 'Paid Date',
+        'started_at'        => 'Started Date',
+        'ended_at'          => 'Ended Date',
+        'billed_at'         => 'Bill Date',
+        'due_at'            => 'Due Date',
+        'invoiced_at'       => 'Invoice Date',
     ],
 
 ];