🐛 Bug report | Shells attached to solid elements do not become hidden

[stevenlabelle]

Description:
When shells attached to a solid are hidden and the solid is also hidden, the shells reappear and take on the color of the solid.

Version:
Dev Version 3.1.0.b111c7aaa

Steps To Reproduce:

1. Open a model with shells attached to solids.
2. Hide the solids.
3. Hide the shells. The shells just change color rather than disappear. They cannot be selected either.