Third option for use_exact_mode: toggle

[PFQNiet]

I was halfway through writing a suggestion for the game itself when I remembered that half of the idea is already implemented for mods.

I would like to suggest an option for chests to have a checkbox allowing the player to toggle exact mode on a given entity. I would especially love it if this could become the default for vanilla requester chests

But I do realise that this would involve making exact mode a runtime thing, so... my hopes are low, but there's still hope!