Fixed play space position

Hi, thanks for maintaining this, Sometime between this and https://github.com/NeoSpark314/BeepSaber the way the playspace coordinate system works changed. In https://github.com/NeoSpark314/BeepSaber the playspace is always in a fixed position relative to the play space but in this fork the position is relative to the where the headset was when the game starts. I presume this change was made because its better for non lighthouse vr systems that dont have a fixed playspace, but its a big annyoing to always have to recenter the space where i want it every time i start the game. I would be nice to have the option to have the fixed position playspace back