Blackstone Variant Names are too Long

The names for the bricks, cracked bricks and chiseled blackstone variants are too long. Please remove the "Polished" from them.

Here is how they should be renamed.

Old Name > New Name

Polished Blackstone Bricks > Blackstone Bricks

Cracked Polished Blackstone Bricks > Cracked Blackstone Bricks

Polished Blackstone Brick Stairs >  Blackstone Brick Stairs

Polished Blackstone Brick Slab > Blackstone Brick Slab

Polished Blackstone Brick Wall > Blackstone Brick Wall

Chiseled Polished Blackstone > Chiseled Blackstone

Polished Blackstone Button > Blackstone Button

Polished Blackstone Pressure Plate > Pressure Plate