Auto show course w/invite + Fix saving

src/components/Snackbar/store.js

@@ -0,0 +1,10 @@
+import { writable } from 'svelte/store';
+import { SNACKBAR_SEVERITY } from './constants';
+
+export const snackbarStore = writable({
+  open: false,
+  message: '',
+  severity: SNACKBAR_SEVERITY.INFO,
+  handleClose: () => {},
+  autoHideDuration: 6000,
+});