Block outline renders behind stained glass

The outline that appears when you're hovering the camera over a block renders behind stained glass blocks.

Steps to Reproduce:

1.  Generate a superflat world made from stained glass
2.  Place a block with a barrier block on top (string, rails, etc. would work too)
3. Look through the barrier 
4. Notice how the outline of the barrier block renders behind the stained glass on the floor