EXCLUD-A-LIST LOG THREE

I have never touched an array before, truthfully I barely knew they existed. They are very convenient though.

I have now spent 2 hours messing with arrays trying to get the code to do what I want, with varying success.
I have successfully gotten the Items and Properties to go into their own arrays. I have gotten the Items to go into the list at the bottom, and the properties to automatically appear as checkboxes with distinct IDs.

I am currently working on making it so that when you add an item, the properties you select go into their own array within an array, and can be accessed later. While talking about this I think I figured out how to do that properly, so this dev log is basically a rubber duck and next devlog I can hopefully tell you about my successes