Fix React hydration issues (#32958)

* Add more playwright axe tests to settings dialogs

* Add utility to jest setupTests to detect React hydration errors

* Iterate jest utility

* Fix axe issue heading-order

* Fix div-in-p issues

* Fix setupTests.ts

* Fix heading order

* Make types happier

* Fix hydration issues of thead containing text nodes

* Update tests

* Fix form-in-form React hydration issues

* Fix li-in-li React hydration issues

* Fix checked in form without onChange React hydration issue

* Fix styling bleeding from _common.pcss

* Update snapshots

* Fix more remaining issues

* Remove _common.pcss h2 rule altogether

* Fix test

* Update snapshots

* Iterate

* Iterate

* Update snapshots

* Simplify diff

* Test

* Update screenshots

* Update screenshot

apps/web/test/unit-tests/components/views/settings/Notifications-test.tsx

@@ -37,7 +37,6 @@ import {
 import { mocked } from "jest-mock";
 import userEvent from "@testing-library/user-event";
 import { PushProcessor } from "matrix-js-sdk/src/pushprocessor";
-import { Form } from "@vector-im/compound-web";
 
 import Notifications from "../../../../../src/components/views/settings/Notifications";
 import SettingsStore from "../../../../../src/settings/SettingsStore";
@@ -249,12 +248,7 @@ const pushRules: IPushRules = {
 const flushPromises = async () => await new Promise((resolve) => window.setTimeout(resolve));
 
 describe("<Notifications />", () => {
-    const getComponent = () =>
-        render(
-            <Form.Root>
-                <Notifications />
-            </Form.Root>,
-        );
+    const getComponent = () => render(<Notifications />);
 
     // get component, wait for async data and force a render
     const getComponentAndWait = async () => {