Functionality is also covered in other examples so that hierarchy is no
longer needed.
In order to keep the use case's code in source, the example was moved to
tests/manual.
Pick-to: 6.5
Change-Id: I6b3e46d402877b93cfa4dc555328e1e115ec4fc6
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Oliver Wolff