* Convert tabbedview to functional component
The 'Tab' is still a class, so now it's a functional component that
has a supporting class, which is maybe a bit... jarring, but I think
is actually perfectly logical.
* put comment back
* Fix bad tab ID behaviour
* Make TabbedView a controlled component
This does mean the logic of keeping what tab is active is now in each
container component, but for a functional component, this is a single
line. It makes TabbedView simpler and the container components always
know exactly what tab is being displayed rather than having to effectively
keep the state separately themselves if they wanted it.
Based on https://github.com/matrix-org/matrix-react-sdk/pull/12478
* Move the active tab in user settings to the dialog title
Separated by a colon, as per the new design.
* Update snapshots
* Update a playwright test
* Fix more tests / snapshots
* Attempt to test all the cases of titleForTabID
* More tests
* split SettingsSection out of SettingsTab, replace usage
* correct copyright
* use semantic headings in GeneralRoomSettingsTab
* use SettingsTab and SettingsSubsection in room settings
* fix VoipRoomSettingsTab
* use SettingsSection components in space settings
* settingssubsection text component
* use semantic headings in HelpUserSetttings tab
* use ExternalLink components for external links
* test
* strict
* lint
* semantic heading in labs settings
* semantic headings in keyboard settings tab
* semantic heading in preferencesusersettingstab
* tidying
* use new settings components in eventindexpanel
* findByTestId
* prettier
* semantic headings and style refresh for crypto settings
* e2e panel
* semantic headings and cleanup in Sidebar user settings
* semantic heading in voice user settings
* sonarcloud bug and test
* Apply `strictNullChecks` to `src/components/views/room_settings/*`
* Restore tsconfig.json
* Conform more code to `strictNullChecks`
* Iterate
* Update matrix-widget-api
* Conform more code to `strictNullChecks`
* Remove all mentions of Piwik
* Kill off all consumer of the old Piwik Analytics module
* Simplify ModalManager interface
* i18n
* Attempt to fix old e2e tests
* Remove unused component
* Iterate PR
