Fix error with react-bootstrap imports

src/App/index.js

@@ -91,11 +91,14 @@ class App extends Component {
       isTimeout: true,
     });
 
-    window.setTimeout(() => { 
+    this.requestTimer = window.setTimeout(() => { 
       this.setState({ isTimeout: false }); 
     }, config.requestTimeout);
   }
 
+  componentWillUnmount() {
+    window.clearTimeout(this.requestTimeout);
+  }
 }
 
 export default App;

src/LangSwitcher/index.js

 import React, {Component} from 'react';
-import Thumbnail from 'react-bootstrap/lib';
+import {Thumbnail} from 'react-bootstrap';
 
 import countryImages from './images';
 

src/Modal/index.js

 import React, { Component } from 'react';
 
-import Modal from 'react-bootstrap/lib';
-import Button from 'react-bootstrap/lib';
-import FormGroup from 'react-bootstrap/lib';
-import FormControl from 'react-bootstrap/lib';
-import ControlLabel from 'react-bootstrap/lib';
-import HelpBlock from 'react-bootstrap/lib';
-import Alert from 'react-bootstrap/lib';
+import {Modal, Button, FormGroup, FormControl, ControlLabel, HelpBlock, Alert } from 'react-bootstrap';
 
 import $ from 'jquery';
 import './Modal.css';