remove modal

src/client/js/components/PageEditor/Editor.jsx

@@ -259,7 +259,7 @@ export default class Editor extends AbstractEditor {
     };
 
     return (
-      <Modal isOpen={this.state.isCheatsheetModalShown} toggle={hideCheatsheetModal} className="modal modal-gfm-cheatsheet">
+      <Modal isOpen={this.state.isCheatsheetModalShown} toggle={hideCheatsheetModal} className="modal-gfm-cheatsheet">
         <ModalHeader tag="h4" toggle={hideCheatsheetModal} className="bg-primary">
           <span className="text-white"><i className="icon-fw icon-question" />Markdown Help</span>
         </ModalHeader>