BaseColor texture on decal material should be grayed out, not hidden when affect BaseColor is disabled

Steps to reproduce : 

• Open scene in the attached project
• Inspect the "Decal Projector" object

Notice that : 

• Even with "Affect BaseColor" disabled, the decal will still affect the opacity
• The BaseColor texture is not visible in the inspector, but its alpha is still used as a mask for the opacity
• Using the rendering debugger, and display the decal atlas, you can see that the base color texture is effectively stored in the atlas, and used.

 

Reproduces with: all versions

Suggestion: Do not remove the BaseColor texture field from the UI if "Affect BaseColor" is disabled, but grey it out like for the other options