Allow deep search of nodes in CSGCombiner

[me2beats]

CSGCombiner doesn't work If I add a Spatial node in it as a pivot.
This could be always allowed or at least an option for the deep search could exist

That's how it should be

[Calinou]

You may be able to accomplish this with a RemoteTransform3D node already:

• Keep the CSGSphere3D node in its original position in the scene tree (as a direct child of the CSGCombiner).
• Put a RemoteTransform3D node as a child of the pivot node.
• Set the RemoteTransform3D's target node to the subtractive CSGSphere3D.