Fixed an issue where the color of the first extruder always replaced the default color after painting in a multi-material gizmo.
Fixed an issue where the color of the first extruder always replaced the default color after painting in a multi-material gizmo.

multi_material_segmentation_by_painting is now returning only the painted region. Regions with default colors that aren't painted by multi-material gizmo aren't returned.

prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r