Apply scale parameter

[jo-mueller]

When working with parameters like curvature, I think it is dangerous to have the scale parameter set in the layer properties. ´This could lead to a sphere appearing perfectly spherical while, in fact, being ellipsoidal.

We could fix this by introducing a small function that "applies" the scale parameter to the points in points/surface layers as this wouldn't change the actual amount of data to be handled - unlike with image data.

[haesleinhuepf]

Then it would also make sense to multiply the voxel size with the vertices, after applying marching cubes, right?

E.g. here:
https://github.com/haesleinhuepf/napari-process-points-and-surfaces/blob/main/napari_process_points_and_surfaces/__init__.py#L424

And the opposite should be done here, I think:
https://github.com/haesleinhuepf/napari-process-points-and-surfaces/blob/main/napari_process_points_and_surfaces/__init__.py#L333

[jo-mueller]

Yes, exactly! PR coming soon 👍