style:课程管理模块缺省图替换，导航栏收起时选中高亮

src/modules/course-manage/modal/ManageCoursewareModal.jsx

@@ -4,19 +4,18 @@
  * @Last Modified by: chenshu
  * @Last Modified time: 2021-06-08 18:18:46
  */
+import PreviewFileModal from '@/bu-components/PreviewFileModal';
 import { FileTypeIcon, FileVerifyMap } from '@/common/constants/academic/lessonEnum';
 import { DEFAULT_SIZE_UNIT, suffixType } from '@/common/constants/academic/liveEnum';
 import Service from '@/common/js/service';
 import User from '@/common/js/user';
 import college from '@/common/lottie/college';
 import { XMTable } from '@/components';
+import BaseService from '@/domains/basic-domain/baseService';
+import { YZ_APPId, YZ_PREVIEW_URL } from '@/domains/basic-domain/constants';
 import ScanFileModal from '@/modules/prepare-lesson/modal/ScanFileModal';
 import SelectPrepareFileModal from '@/modules/prepare-lesson/modal/SelectPrepareFileModal';
-import Service from '@/common/js/service';
-import BaseService from '@/domains/basic-domain/baseService';
-import PreviewFileModal from '@/bu-components/PreviewFileModal';
-import { YZ_APPId, YZ_PREVIEW_URL, OFFICE_PREVIEW_URL } from '@/domains/basic-domain/constants';
-import { LoadingOutlined, QuestionCircleOutlined } from '@ant-design/icons';
+import { LoadingOutlined } from '@ant-design/icons';
 import { Button, message, Modal, Popconfirm, Spin, Tooltip } from 'antd';
 import Lottie from 'lottie-web';
 import moment from 'moment';