Very nice working example but I don't understand why they would maintain the X to close modules when it is so easy to close required functionality (like Save).

Very nice working example but I don't understand why they would maintain the X to close modules when it is so easy to close required functionality (like Save). Are you unable to remove the Close button and they had to add "Reset Layout" to get around it? To me most of those modules shouldn't be permitted to be closed.