update upload-list zindex (#2784)

frontend/src/components/file-uploader/file-uploader.js

@@ -40,7 +40,7 @@ class FileUploader extends React.Component {
       isUploadProgressDialogShow: false,
       isUploadRemindDialogShow: false,
       currentResumableFile: null,
-      uploadBitrate: 0
+      uploadBitrate: '0'
     };
 
     this.notifiedFolders = [];

frontend/src/components/file-uploader/upload-progress-dialog.js

@@ -4,7 +4,7 @@ import { gettext } from '../../utils/constants';
 import UploadListItem from './upload-list-item';
 
 const propTypes = {
-  uploadBitrate: PropTypes.number.isRequired,
+  uploadBitrate: PropTypes.string.isRequired,
   totalProgress: PropTypes.number.isRequired,
   uploadFileList: PropTypes.array.isRequired,
   onCloseUploadDialog: PropTypes.func.isRequired,

frontend/src/css/file-uploader.css

@@ -20,6 +20,7 @@
   border-radius: 3px;
   box-shadow: 0 0 6px #ddd;
   background-color: #fff;
+  z-index: 1050;
 }
 
 .uploader-list-header {