Showing the usage of QMenuBar and QStatusBar in a QMainWindow can be
merged into another if 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: I76ec12e9c83a42028f2de95ab17ca07544b53425
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Oliver Wolff