test(setup): wait for the window to be shown

The setup window is shown in an effect, which can run after the test finds the first page. The check failed now and then, locally and in CI.

Author: httpsphl

app/src/setup/setup.test.tsx

@@ -20,7 +20,8 @@ describe("setup window", () => {
     const host = await open();
     expect(screen.getByRole("heading", { name: "Botloft" })).toBeDefined();
     expect(screen.getByText(/without asking for an administrator/)).toBeDefined();
-    expect(host.calls).toContain("show");
+    // The window is shown in an effect, which may run after the page is found.
+    await waitFor(() => expect(host.calls).toContain("show"));
 
     fireEvent.click(screen.getByRole("button", { name: "Install" }));
     expect(screen.getByRole("progressbar")).toBeDefined();