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

convert more messages over to messsagse::add

core/groups/permissions_default.php

@@ -51,7 +51,7 @@
 //redirect the users
 	if (!$included) {
 		//show a message to the user
-		$_SESSION["message"] = $text['message-restore'];
+		messages::add($text['message-restore']);
 		header("Location: groups.php");
 		return;
 	}