Vulkan: Decals can't be selected by clicking on them in the 3D editor viewport

[honix]

Describe the project you are working on

Testing Godot v4.0.dev.20211015.official [f113dc9]

Describe the problem or limitation you are having in your project

It is possible to have many of decals in the scene and struggle to select and manipulate them in easy way using 3d view.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

The decals will be selectable in 3d view.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

When user clicks a decals bounding box, the decal will become active.

If this enhancement will not be used often, can it be worked around with a few lines of script?

It cant be worked around with a few lines of script.

Is there a reason why this should be core and not an add-on in the asset library?

It is core functionality.

[honix]

The purple lines, indicating decals bounding box, is expected to be clickable, but its not.

[Calinou]

This is actually a bug related to 3D editor raycast selection having regressed in master, but I can't find the related issue right now.