TransientPropagation: fix corner cases of reflection code

                position = Eigen::Vector3d(position.x(), position.y(), 2. * intercept.z() - position.z());

                LOG(TRACE) << "Carrier was reflected on the sensor surface to "

                           << Units::display(static_cast<ROOT::Math::XYZPoint>(position), {"um", "nm"});

                // Re-check if we ended in an implant - corner case.

                if(model_->isWithinImplant(static_cast<ROOT::Math::XYZPoint>(position))) {

                    LOG(TRACE) << "Ended in implant after reflection - halting";

                    state = CarrierState::HALTED;

                }

                // Re-check if we are within the sensor - reflection at sensor side walls:

                if(!model_->isWithinSensor(static_cast<ROOT::Math::XYZPoint>(position))) {

                    position = Eigen::Vector3d(intercept.x(), intercept.y(), intercept.z());

                    state = CarrierState::HALTED;

                }

            }

            LOG(TRACE) << "Moved carrier to: " << Units::display(static_cast<ROOT::Math::XYZPoint>(position), {"nm"});

        }