Smooth quartz slab is now using the texture of normal quartz slab

Smooth quartz slab is now using the texture of normal quartz slab, this also includes its item form. Double slab is unaffected.

Steps to Reproduce:

1. Place a smooth quartz slab.
2. Place a normal quartz slab next to it.
3. Compare their textures.

Observed Results:
Smooth quartz slab have the texture of normal quartz slab.

Expected Results:
Smooth quartz slab would use its own texture.