add func and comment out

src/client/js/components/Admin/MarkdownSetting/PresentationForm.jsx

@@ -33,7 +33,7 @@ class PresentationForm extends React.Component {
 
   render() {
     const { t, markDownSettingContainer } = this.props;
-    const { pageBreakSeparator, pageBreakCustomSeparator } = markDownSettingContainer.state;
+    const { /* pageBreakSeparator, */ pageBreakCustomSeparator } = markDownSettingContainer.state;
 
     return (
       <fieldset className="form-group row my-2">

src/client/js/services/MarkDownSettingContainer.js

@@ -34,6 +34,13 @@ export default class MarkDownSettingContainer extends Container {
     return 'MarkDownSettingContainer';
   }
 
+  /**
+   * Switch PageBreakSeparator
+   */
+  switchPageBreakSeparator(pageBreakSeparator) {
+    this.setState({ pageBreakSeparator: this.state.pageBreakSeparator });
+  }
+
   /**
    * Switch enableXss
    */