Fix name included in animation when saved from slice in scene importer

(cherry picked from commit c6c4c55)

Author: shadowcow13

editor/import/3d/resource_importer_scene.cpp

@@ -1958,6 +1958,7 @@ void ResourceImporterScene::_create_slices(AnimationPlayer *ap, Ref<Animation> a
 			}
 		}
 
+		new_anim->set_name(name);
 		new_anim->set_loop_mode(loop_mode);
 		new_anim->set_length(to - from);
 		new_anim->set_step(anim->get_step());