想要修改dreamview，让前端显示的六张图片改为右下角显示一张组件传来的图片并且删除其他五张图片，怎么修改，修改dreamview/frontend_lane，还是dreamview/backend。如果能将lane_marker展示为想要的图片，那就最好了。

下面是modules/dreamview的文件目录：
modules
- dreamview
--backend
---common
----BUILD
----dreamview_gflags.cc
----dreamview_gflags.h
---fuel_monitor
----BUILD
----data_collection_monitor_test.cc
----data_collection_monitor.cc
----data_collection_monitor.h
----fuel_monitor_gflags.cc
----fuel_monitor_gflags.h
----fuel_monitor_manager.cc
----fuel_monitor_manager.h
----fuel_monitor.h
----preprocess_monitor.cc
----preprocess_monitor.h
---handles
----BUILD
----image_handler.cc
----image_handler.h
----websocket_handler_test.cc
----websocket_handler.cc
----websocket_handler.h
---hmi
----testdata/vehicle/vehicle_data.pb.txt
----BUILD
----hmi_worker_test.cc
----hmi_worker.cc
----hmi_worker.h
----hmi.cc
----hmi.h
----vehicle_manager_main.cc
----vehicle_manager_test.cc
----vehicle_manager.cc
----vehicle_manager.h
---map
----BUILD
----map_service_test.cc
----map_service.cc
----map_service.h
---perception_camera_updater
----BUILD
----perception_camera_updater.cc
----perception_camera_updater.h
---point_cloud
----BUILD
----point_cloud_updater.cc
----point_cloud_updater.h
---sim_control
----BUILD
----sim_control_interface.h
----sim_control_test.cc
----sim_control.cc
----sim_control.h
---simulation_world
----BUILD
----simulation_world_service_test.cc
----simulation_world_service.cc
----simulation_world_service.h
----simulation_world_updater.cc
----simulation_world_updater.h
---teleop
----images
----proto
-----BUILD
-----daemon_cmd.proto
-----daemon_rpt.proto
-----modem_info.proto
----BUILD
----teleop_test.cc
----teleop.cc
----teleop.h
---testdata
----BUILD
----data_collection_tabe_test.pb.txt
----garage.bin
----routing.pb.txt
---BUILD
---dreamview.cc
---dreamview.h

-- frontend_lane
---asserts
----images
----models
---config
----parameters.js
---dist
----assets
----fonts
----icons
----app_bundle.js
----app.bundle.js.LICENSE.txt
----app.bundle.js.map
----componets_Navigation_BaiduMapAdapter_js.bundle.js
----componets_Navigation_GoogleMapAdapter_js.bundle.js
----componets_Navigation_index_js.bundle.js
----index.html
----parameters.bundle.js
----parameters.json
----worker.bundle.js
----worker.bundle.js.map
---proto_bundle
----point_cloud_proto_bundle.json
----sim_world_proto_bundle.json
---src
----components
-----ApplicationGuideModal
-----CameraParam
-----common
-----DataCollectionMonitor
-----DataProfile
-----DataRecorder
-----DefaultRouting
-----FuelClient
-----Header
-----Layouts
-----ModuleController
-----Navigation
-----PlaybackControls
-----PNCMonitor
-----RouteEditingBar
-----Scene
-----SideBar
-----StatusBar
-----Tasks
-----TeleopMonitor
-----Dreamview.js
-----Offlineview.js
----fonts
----renderer
-----traffic_controls
-----adc.js
-----check_points.js
-----coordinates.js
-----decision.js
-----gnss.js
-----ground.js
-----index.js
-----map.js
-----obstacles.js
-----point_cloud.js
-----prediction.js
-----routing_editor.js
-----routing.js
-----status.js
-----text3d.js
-----tileground.js
-----trajectory.js
----store
-----config
------ControlGraph.yml
------hotkeys.yml
------LatencyGraph.yml
------MenuData.js
------parameters.yml
------PlanningGraph.yml
-----websocker
------index.js
------websocket_camera.js
------websocket_map.js
------websocket_offline.js
------websocket_plugin.js
------websocket_point_cloud.js
------websocket_realtime.js
------websocket_teleop.js
-----camera_data.js
-----control_data.js
-----dimension.js
-----hmi.js
-----index.js
-----latency.js
-----meters.js
-----monitor.js
-----planning_data.js
-----playback.js
-----route_editing_manager.js
-----story_tellers.js
-----studio_connector.js
-----teleop.js
-----traffic_signal.js
-----utterance.js
----styles
----utils
-----chart.js
-----constant.js
-----coordinate_converter.js
-----draw.js
-----JSON.js
-----misc.js
-----models.js
-----script_loader.js
-----vehicleInfoMap.js
-----webworker.js
----app.js
----index.hbs
----offline.js
---.airbnd.eslintrc
---.babelrc.js
---.eslintrc
---.gitignore
---.nvmrc
---gen_pbjs.sh
---jsconfig.json
---package.json
---setup.sh
---webpack.config.js
---webpack.offline.config.js
---yarn.lock
---launch
----dreamview_lane.launch
----dreamview.launch
---proto
----BUILD
----camera_update.proto
----chart.proto
----data_collection_table.proto
----hmi_config.proto
----hmi_mode.proto
----hmi_status.proto
----point_cloud.proto
----preprocess_table.proto
----simulation_world.proto
---BUILD
---main.cc

其中Dreamview.js文件：
import React from 'react';
import { inject, observer } from 'mobx-react';

import SplitPane from 'react-split-pane';
import Header from 'components/Header';
import MainView from 'components/Layouts/MainView';
import ToolView from 'components/Layouts/ToolView';
import MonitorPanel from 'components/Layouts/MonitorPanel';
import SensorCamera4 from 'components/Tasks/SensorCamera4';
import SensorCamera5 from 'components/Tasks/SensorCamera5';
import SensorCamera6 from 'components/Tasks/SensorCamera6';
import SideBar from 'components/SideBar';

import ApplicationGuideModal from 'components/ApplicationGuideModal';

import HOTKEYS_CONFIG from 'store/config/hotkeys.yml';
import WS, { MAP_WS, POINT_CLOUD_WS, CAMERA_WS, CAMERA2_WS, CAMERA3_WS, CAMERA4_WS, CAMERA5_WS, CAMERA6_WS  } from 'store/websocket';

@inject('store') @observer
export default class Dreamview extends React.Component {
  constructor(props) {
    super(props);
    this.handleDrag = this.handleDrag.bind(this);
    this.handleKeyPress = this.handleKeyPress.bind(this);
    this.updateDimension = this.props.store.dimension.update.bind(this.props.store.dimension);
  }

  handleDrag(masterViewWidth) {
    const { options, dimension } = this.props.store;
    if (options.showMonitor) {
      dimension.updateMonitorWidth(
        Math.min(
          Math.max(window.innerWidth - masterViewWidth, 0),
          window.innerWidth,
        ),
      );
    }
  }

  handleKeyPress(event) {
    const { options, enableHMIButtonsOnly, hmi } = this.props.store;

    const optionName = HOTKEYS_CONFIG[event.key];
    if (!optionName || options.showDataRecorder
      || options.showDefaultRoutingInput || options.showCycleNumberInput
      || options.showFuelClient) {
      return;
    }

    event.preventDefault();
    if (optionName === 'cameraAngle') {
      // press 'v' to switch camera angle
      options.rotateCameraAngle();
    } else if (
      !options.isSideBarButtonDisabled(optionName, enableHMIButtonsOnly, hmi.inNavigationMode)
    ) {
      this.props.store.handleOptionToggle(optionName);
    }
  }

  componentWillMount() {
    this.props.store.dimension.initialize();
  }

  componentDidMount() {
    WS.initialize();
    MAP_WS.initialize();
    POINT_CLOUD_WS.initialize();
    CAMERA_WS.initialize();
    CAMERA2_WS.initialize();
    CAMERA3_WS.initialize();
    CAMERA4_WS.initialize();
    CAMERA5_WS.initialize();
    CAMERA6_WS.initialize();

    window.addEventListener('resize', this.updateDimension, false);
    window.addEventListener('keypress', this.handleKeyPress, false);
  }

  componentWillUnmount() {
    window.removeEventListener('resize', this.updateDimension, false);
    window.removeEventListener('keypress', this.handleKeyPress, false);
  }

  render() {
    const { dimension, options, hmi } = this.props.store;
    const { currentVehicleType } = hmi;

    return (
            <div>
                <Header />
                <div className="pane-container">
                    <SplitPane
                        split="vertical"
                        size={dimension.pane.width}
                        onChange={this.handleDrag}
                        allowResize={options.showMonitor}
                    >
                        <div className="left-pane">
                            <SideBar />
                            <div className="dreamview-body">
                              {options.showTasks &&
                                <div className="tools">
                                  <div className="tasks">
                                    <SensorCamera4 />
                                    <SensorCamera5 />
                                    <SensorCamera6 />
                                  </div>
                                </div>}
                                <MainView />
                                <ToolView />
                            </div>
                        </div>
                        <MonitorPanel
                            hmi={hmi}
                            viewName={options.monitorName}
                            showVideo={options.showVideo}
                        />
                    </SplitPane>
                </div>
              {
                // When the current vehicle is dkit series, the safety pop-up is displayed
                (currentVehicleType > 0 && currentVehicleType <= 7) &&
                <ApplicationGuideModal />}
            </div>
    );
  }
}