Optimized search module (#2397)

* updating fileRecord api and adding more component

* modify search module

* add translate

frontend/src/components/more.js

@@ -0,0 +1,22 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { gettext } from './constants';
+
+const propTypes = {
+  onShowMore: PropTypes.func.isRequired
+};
+
+class More extends React.Component {
+
+  render() {
+    return (
+      <li className="list-show-more" onClick={this.props.onShowMore}>
+        <span className="more-message">{gettext('show more')}</span>
+      </li>
+    )
+  }
+}
+
+More.propTypes = propTypes;
+
+export default More;