* Small refactoring, a review of used scopes for coroutines.
Use AppScope instead of ViewModelScope, if there is a reasonable expectation that the a screen could be closed prematurely, and we still want an operation scoped to it's viewmodel to complete.

* Fix tests

Co-authored-by: ralfgehrer <mail@ralfgehrer.com>
Co-authored-by: Lukas Lechner <lukas.lechner@sap.com>