Making 3D Solid a Guide Layer Hides 3D Layer Indicator. (STRICTLY VISUAL ERROR)
Steps to reproduce:
1. Have a comp with a 3D enabled solid and a Camera
2. Right Click > Guide Layer
Result: 3D Layer Indicator dissapeares
Expected: Regardless if the layer is a guide layer I'd expect to be able to see if a layer is a 3D.
I suspect that this is related to the 3D stack as it doesn't happen to layers in the middle of a stack but does disappear if the guide layer is on the top or bottom.

All the solids in the above image are 3D.
System info
Application: After Effects (Beta) v18.2.0.20
OS: Windows v10.0.18363, RAM: 15.93 GB, CPUs (logical): 8
