Sandstone Slab labelled as Red Sandstone Slab

Put the summary of the bug you're having here

What I expected to happen was...:
hovering over the creative mode materials, the Sandstone Slab icon would be labelled "Sandstone Slab" and the Red Sandstone Slab would be labelled "Red Sandstone Slab."

What actually happened was...:
the Red Sandstone was labelled correctly, but the Sandstone Slab was labelled "Red Sandstone Slab."

Steps to Reproduce:
1. Enter Creative Mode
2. Open the Building Blocks menu
3. Scroll down to the Sandstone Slab icon
4. Hover the cursor over the icon for its label to appear