Code refactoring

Author: BobsProgrammingAcademy

frontend/src/layout/Sidebar.js

@@ -1,4 +1,6 @@
 import PropTypes from 'prop-types';
+
+// Material Icons
 import Link from 'next/link';
 import Box from '@mui/material/Box';
 import Drawer from '@mui/material/Drawer';