Carry hatch origin through creation and pattern editing

src/scene/view/render.rs

@@ -2886,6 +2886,7 @@ impl Scene {
                 }
                 boundary.push(boundary[0]);
                 hatches.push(HatchModel {
+                    pattern_origin: None,
                     render_instance: wire.render_instance.clone(),
                     world_origin: [0.0, 0.0],
                     boundary: Arc::new(boundary),