change unit test usage of notes field (#780)

Added an extra `waitFor` after a flaky unit test step.

I'm not really super happy with this workaround.. but it does make the
test much more stable (re-ran 5x and no failures:
https://github.com/actualbudget/actual/actions/runs/4455134799).

I think there is some internal timeout happening somewhere which is
causing this issue.. But not really sure where. And this will hopefully
get auto-fixed once we migrate to a new table. 

packages/desktop-client/src/components/accounts/TransactionsTable.test.js

 import React, { useState, useEffect } from 'react';
 
-import { render, screen, fireEvent } from '@testing-library/react';
+import { render, screen, fireEvent, waitFor } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { format as formatDate, parse as parseDate } from 'date-fns';
 
@@ -359,6 +359,9 @@ describe('Transactions', () => {
     // When reaching the bottom it shouldn't error
     input = await editField(container, 'notes', 4);
     await userEvent.type(input, '[Enter]');
+    await waitFor(() => {
+      expect(container.querySelector('input')).toBeNull();
+    });
 
     // When reaching the top it shouldn't error
     input = await editField(container, 'notes', 0);

upcoming-release-notes/780.md

+---
+category: Maintenance
+authors: [MatissJanis]
+---
+
+Add `waitFor` to a flaky unit test to make it more stable