Display help box in oo apps

www/sheet/inner.html

@@ -10,8 +10,10 @@
 <body class="cp-app-sheet">
     <div id="cp-toolbar" class="cp-toolbar-container"></div>
     <div id="cp-app-oo-container">
-        <div id="cp-app-oo-placeholder"></div>
-        <script type="text/javascript" src="/common/onlyoffice/web-apps/apps/api/documents/api.js"></script>
+        <div id="cp-app-oo-editor">
+            <div id="cp-app-oo-placeholder"></div>
+            <script type="text/javascript" src="/common/onlyoffice/web-apps/apps/api/documents/api.js"></script>
+        </div>
     </div>
 </body>