Added the possibility to upload a file containing users to a group

src/components/Navbar.tsx

@@ -1,6 +1,5 @@
 import {User} from "@/interfaces/user";
 import Link from "next/link";
-import {Avatar} from "primereact/avatar";
 import FocusLayer from "@/components/FocusLayer";
 import {preventNavigation} from "@/utils/navigation.disabled";
 import {useRouter} from "next/router";