Generate Support illumination

[RetroDesign3D]

Would like S3D to be able to color faces that it would generate supports on, so I can have a guide when manually adding supports. Sometimes when generating supports on models the S3D algorithm is just a little too aggressive, especially on very small models. This would allow us to see where S3D would want supports as a guide when manually adding our own.

[billyd]

Nice idea would like this as well