Quark-r2.1-233
The Item model is a missing texture box, and Double Smooth Stone Vertical Slabs will always face east/west

Item model never broke when i was testing this, so not sure what's up with that.

Facing issue is #2028.

I'll see if readding the old deleted smooth stone slab json fixes it at all.

Gonna revert @muzikbike's PR for now. Feel free to do another once you've figured it out. The facing issue is wontfix though, so if you could remove that change too I'd appreciate it.