Optimization: split meshes automatically when avoid_crossing_perimeters is enabled, so that we reduce the complexity of the MotionPlanner graphs. This commit includes a very large refactoring of the Model class which is now responsible for duplication and arrangement

lib/Slic3r/GUI/Plater.pm

@@ -715,6 +715,7 @@ sub make_model {
             rotation    => $plater_object->rotate,
             offset      => [ @$_ ],
         ) for @{$plater_object->instances};
+        $new_model_object->align_to_origin;
     }
     
     return $model;