How to close Project and throw Notifications

Hello all,
As i have see in ProjeQtOr, Project can't be closed when child items is not closed like Questions or Documents for example.

So, is it means that we must closing all child items one by one before cloturing Project or does it exist one command to closed the project and closed their child items recursively.

Also, in case such a commmand exist, does it throw an notification for all items or only for project item.
I take this opportunity to point out that their is no notification by defaut for closing Project in "Event notification" but it is probably related to ProjeQtOr behavior.

And what about restoring Project and all their items, please ?

Thanks you very much for your help.