[1.7 AFFECTING LIVE] Blocks in the inventory don't follow textures set in blocks.json

Verification builds:

Ver. 1.7.2 Beta, Build 1117901

Summary:

Blocks in the UI don't render properly because they don't follow textures set in blocks.json

Impact:

Blocks appear differently to how they look when placed.

Repro Steps:

1. Download Alien Worlds Texture Pack
2. Give yourself a furnace and a bookshelf
3. Place both blocks down

Observed Results:

Both the furnace and bookshelf use correct textures when placed as a block, but incorrect textures when displayed in the UI / Inventory

Expected Results:

Blocks in the inventory should display correctly and use the textures specified in blocks.json

Screenshots/Videos attached: 

Yes

Regression Build

1.6.0.8