Greetings, today's patch fixes a crash caused by incorrect behavior of the underwear & swimsuit layering

Modding API changes

The behavior of the mandatory property in item categories has been modified: It still exists, but as the logic wasn't working properly, it is no longer used by BondsSession#setItem() to ensure the presence of underwear. A new BondsSession#_ensureUnderwear() function now takes that role.