“None of the above”: new settings for exclusive items in questfox

A list of multiple answers often has this one item saying “None of the above”.
You can now switch a single item of a checkboxlist to “exclusive” which makes all other answers of this list disappear with one click on “answer is exclusive in checkboxlist” in the settings of this specific item.

Example of a list of answers (some of them checked):

The moment the surveytaker clicks on “None of the above” all other answers vanish: