The blast furnace II has a weird shadow

Issue description

You can see it in the UR part of each of these. This might be part of the shadow that should show up when built, but it shouldn't show up when unbuilt.

Reproduction steps

Place down and look at it.

Game version and build number

Update 1 0.5.3c (222)

Operating system

Windows

I can also see this in the crusher

I think in this case it's the shadow from the elevated port. Basically, a number of things that shouldn't have shadows while unbuilt, do.

Port ghost shadow was fixed in v0.5.3e, thanks! Blast furnace is still TODO.