[Alan_SP]

Just noticed one thing: If there's no closing reason given, user's who are able to see closing reason see it (and if they're guests, they see special guest message).

But, description of this option is this:

Select which usergroups can see the closed message, if the thread is closed, and there was a reason added.

Because of it I was thinking they would see reason for closing thread only if it is given, not message that no reason is given at the moment.

And that made me thinking about a new feature request, that we have option to see thread reason only if it exist. Other option is that we see it in any case, even if thread is closed without given reason.

Or just change description, to set which usergroups would see closing reason, whether it exist or not.