not use isRetreiving

src/client/js/admin.jsx

@@ -1,4 +1,4 @@
-import React, { Suspense } from 'react';
+import React from 'react';
 import ReactDOM from 'react-dom';
 import { Provider } from 'unstated';
 import { I18nextProvider } from 'react-i18next';
@@ -79,19 +79,6 @@ const injectableContainers = [
 
 logger.info('unstated containers have been initialized');
 
-const createSuspenseComponent = function(component) {
-  return (
-    <Suspense fallback={(
-      <div className="row">
-        <i className="fa fa-5x fa-spinner fa-pulse mx-auto text-muted"></i>
-      </div>
-      )}
-    >
-      {component}
-    </Suspense>
-  );
-};
-
 /**
  * define components
  *  key: id of element
@@ -99,12 +86,12 @@ const createSuspenseComponent = function(component) {
  */
 Object.assign(componentMappings, {
   'admin-home': <AdminHome />,
-  'admin-app': createSuspenseComponent(<AppSettingsPage />),
-  'admin-markdown-setting': createSuspenseComponent(<MarkdownSetting />),
+  'admin-app': <AppSettingsPage />,
+  'admin-markdown-setting': <MarkdownSetting />,
   'admin-customize': <Customize />,
   'admin-importer': <ImportDataPage />,
   'admin-export-page': <ExportArchiveDataPage />,
-  'admin-notification-setting': createSuspenseComponent(<NotificationSetting />),
+  'admin-notification-setting': <NotificationSetting />,
   'admin-global-notification-setting': <ManageGlobalNotification />,
   'admin-user-page': <UserManagement />,
   'admin-external-account-setting': <ManageExternalAccount />,

src/client/js/services/AdminAppContainer.js

@@ -18,7 +18,6 @@ export default class AdminAppContainer extends Container {
     this.appContainer = appContainer;
 
     this.state = {
-      isRetrieving: true,
       retrieveError: null,
       title: '',
       confidential: '',

src/client/js/services/AdminMarkDownContainer.js

@@ -18,7 +18,6 @@ export default class AdminMarkDownContainer extends Container {
     this.appContainer = appContainer;
 
     this.state = {
-      isRetrieving: true,
       retrieveError: null,
       isEnabledLinebreaks: false,
       isEnabledLinebreaksInComments: false,

src/client/js/services/AdminNotificationContainer.js

@@ -48,7 +48,6 @@ export default class AdminNotificationContainer extends Container {
       const { notificationParams } = response.data;
 
       this.setState({
-        isRetrieving: false,
         webhookUrl: notificationParams.webhookUrl,
         isIncomingWebhookPrioritized: notificationParams.isIncomingWebhookPrioritized,
         slackToken: notificationParams.slackToken,