💚 [#52] Update tests after behaviour change

Setting the data source to 'manual' now populates the values
with a single empty option.

src/components/builder/values/values-config.stories.tsx

@@ -135,7 +135,6 @@ export const SelectBoxesResetState: StoryObj<{
       await userEvent.click(await canvas.findByText('Manually fill in'));
       const addBtn = await canvas.findByRole('button', {name: 'Add another'});
       await expect(addBtn).toBeVisible();
-      await userEvent.click(addBtn);
 
       await doSubmit();
       await expect(args.onSubmit).toHaveBeenCalledWith({
@@ -183,7 +182,8 @@ export const SelectBoxesResetState: StoryObj<{
       await doSubmit();
       await expect(args.onSubmit).toHaveBeenCalledWith({
         openForms: {dataSrc: 'manual'},
-        values: [], // all pre-existing items have been cleared
+        // all pre-existing items have been cleared and we ensure there's at least 1 item
+        values: [{value: '', label: '', openForms: {translations: {}}}],
       });
       // @ts-expect-error jest mocks + TS doesn't play nice together
       args.onSubmit.mockClear();