The Welcome Home Screen: Return Button (#9089)

* Implement button to return to user onboarding screen
* Add analytics events
* Increase stability of lazy loading test

src/components/views/settings/tabs/user/PreferencesUserSettingsTab.tsx

@@ -46,6 +46,7 @@ interface IState {
 export default class PreferencesUserSettingsTab extends React.Component<IProps, IState> {
     private static ROOM_LIST_SETTINGS = [
         'breadcrumbs',
+        "FTUE.userOnboardingButton",
     ];
 
     private static SPACES_SETTINGS = [