Optimized wiki code (#2566)

* optimized path component

* abstract component

* repair copy bug

* move copy&move&download to list-item

* add modal portal

frontend/src/components/cur-dir-path/index.js

@@ -0,0 +1,30 @@
+import React, { Fragment } from 'react';
+import PropTypes from 'prop-types';
+import DirPath from './dir-path';
+import DirTool from './dir-tool';
+
+const propTypes = {
+  repoName: PropTypes.string.isRequired,
+  currentPath: PropTypes.string.isRequired,
+  onPathClick: PropTypes.func.isRequired,
+};
+
+class CurDirPath extends React.Component {
+
+  render() {
+    return (
+      <Fragment>
+        <DirPath 
+          repoName={this.props.repoName}
+          currentPath={this.props.currentPath}
+          onPathClick={this.props.onPathClick}
+        />
+        <DirTool currentPath={this.props.currentPath} />
+      </Fragment>
+    );
+  }
+}
+
+CurDirPath.propTypes = propTypes;
+
+export default CurDirPath;