.road assets ignore Hidden flag

[victorleblais]

Describe the bug
I have made a custom .road asset to be used in a custom .roadstation and it appears in the road construction UI despite having "Hidden": true,

Steps to reproduce

• Duplicate regular.road and name it test.road
• Change Hidden from false to true

Build version
0.86.0.0 steam
Issue was still present in older versions

Platform
Windows 10 (20H2, Build 19042.964)

Reproducibility
100%

Logs/saves
Here's a sample .road file to be placed in Content to test:
Road not hidden.zip

[andrewpey]

The fix is live on the beta branch.