Unwrap UVW - Unfold3D packing respects UV selection and Rescale Clusters

[dswahn]

The Unfold3D packing mode does not respect face selections the way the older packing modes do.

Please fix so that Unfold3D utilizes the same functionality like the previous packing modes do.

With any older packing mode only the selection is packed.

I

With Unfold3D all UV clusters are packed, regardless of selection.

Packing with Rescale Clusters off with any of the old packing modes respects differently sized UV clusters.

Unfold3D does not preserve the difference in UV sizes, and will normalize all UV clusters to each other before packing, despite Rescale Clusters being off.

[duo01486]

Support.

[Kranos_Orphydian]

definitely need this!