Extracted update banner to a separated component

src/common/AppUpdateBanner.tsx

@@ -0,0 +1,16 @@
+import { FC, MouseEventHandler } from 'react';
+import { Alert } from 'reactstrap';
+import { SimpleCard } from '../utils/SimpleCard';
+import './AppUpdateBanner.scss';
+
+interface AppUpdateBannerProps {
+  isOpen: boolean;
+  toggle: MouseEventHandler<any>;
+}
+
+export const AppUpdateBanner: FC<AppUpdateBannerProps> = (props) => (
+  <Alert className="app-update-banner" {...props} tag={SimpleCard} color="secondary">
+    <h4 className="mb-4">This app has just been updated!</h4>
+    <p className="mb-0">Restart it to enjoy the new features.</p>
+  </Alert>
+);