fixes for hotkeys usage in docusaurus

extensions/default/src/ViewerLayout/index.jsx

@@ -11,11 +11,9 @@ import {
 } from '@ohif/ui';
 
 import i18n from '@ohif/i18n';
-import { utils } from '@ohif/ui';
+import { hotkeys } from '@ohif/core';
 import { useNavigate } from 'react-router-dom';
 
-const { hotkeys } = utils;
-
 const { availableLanguages, defaultLanguage, currentLanguage } = i18n;
 
 import { useAppConfig } from '@state';