Enhance - More messages::add updates (#2662)

convert more messages over to messsagse::add

core/domain_settings/domain_setting_delete.php

@@ -56,7 +56,7 @@ else {
 	}
 
 //redirect the user
-	$_SESSION["message"] = $text['message-delete'];
+	messages::add($text['message-delete']);
 	header("Location: domain_edit.php?id=".$domain_uuid);
 	return;