* Add some tests for DeferredFulfillment with Observation.
* Use StateStoreViewModelV2 in AuthenticationStartScreen.
* Use StateStoreViewModelV2 in ServerConfirmationScreen.
* Use StateStoreViewModelV2 in ServerSelectionScreen.
* Use StateStoreViewModelV2 in SoftLogoutScreen.
* Use StateStoreViewModelV2 in SettingsScreen.
* Use StateStoreViewModelV2 in DeveloperOptionsScreen.
* Use StateStoreViewModelV2 in AdvancedSettingsScreen.