Continuing with the bit-by-bit refactor of my code for GLS, in order to add new features.

The core mechanic relies on the passage of days, so I'm adding in a button to skip to the next day and having it only become interactable once the current day's goings on are all dealt with.

Sounds simple right? Yeah, well, I'm sure it would've been if I had any idea what I was doing at the start of this project, but that's half the fun.