Fixed: File browser

(cherry picked from commit f7ce5c7b115ea0d12ab63f19960c473e09e30f3d)

frontend/src/Components/FileBrowser/FileBrowserModalContent.js

@@ -1,6 +1,5 @@
 import PropTypes from 'prop-types';
 import React, { Component } from 'react';
-import ReactDOM from 'react-dom';
 import Alert from 'Components/Alert';
 import PathInput from 'Components/Form/PathInput';
 import Button from 'Components/Link/Button';
@@ -39,7 +38,7 @@ class FileBrowserModalContent extends Component {
   constructor(props, context) {
     super(props, context);
 
-    this._scrollerNode = null;
+    this._scrollerRef = React.createRef();
 
     this.state = {
       isFileBrowserModalOpen: false,
@@ -57,21 +56,10 @@ class FileBrowserModalContent extends Component {
       currentPath !== prevState.currentPath
     ) {
       this.setState({ currentPath });
-      this._scrollerNode.scrollTop = 0;
+      this._scrollerRef.current.scrollTop = 0;
     }
   }
 
-  //
-  // Control
-
-  setScrollerRef = (ref) => {
-    if (ref) {
-      this._scrollerNode = ReactDOM.findDOMNode(ref);
-    } else {
-      this._scrollerNode = null;
-    }
-  };
-
   //
   // Listeners
 
@@ -143,7 +131,7 @@ class FileBrowserModalContent extends Component {
           />
 
           <Scroller
-            ref={this.setScrollerRef}
+            ref={this._scrollerRef}
             className={styles.scroller}
             scrollDirection={scrollDirections.BOTH}
           >