Fix Physics Picking captured Object initialization

Initialize variables when a captured object is known.

scene/main/viewport.cpp

@@ -839,6 +839,9 @@ void Viewport::_process_picking() {
 			capture_object = Object::cast_to<CollisionObject3D>(ObjectDB::get_instance(physics_object_capture));
 			if (!capture_object || !camera_3d || (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed())) {
 				physics_object_capture = ObjectID();
+			} else {
+				last_id = physics_object_capture;
+				last_object = capture_object;
 			}
 		}