Change delete wiki page UI (#7171)

* change delete wiki page UI

* optimise codes

* fix text

frontend/src/components/common/common-undo-tool.js

@@ -0,0 +1,22 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { gettext } from '../../utils/constants';
+
+function CommonUndoTool(props) {
+  const style = {
+    color: 'rgb(71, 184, 129)',
+    marginLeft: '8px',
+    paddingBottom: '1px',
+    borderBottom: '1px solid rgb(71, 184, 129)',
+    cursor: 'pointer',
+  };
+  return (
+    <span onClick={(e) => {e.stopPropagation(); props.onUndoOperation(e);}} style={style}>{gettext('Undo')}</span>
+  );
+}
+
+CommonUndoTool.propTypes = {
+  onUndoOperation: PropTypes.func.isRequired,
+};
+
+export default CommonUndoTool;