The test was flaky in recent test runs on X11. Debugging
showed that the global position of the synthesized mouse
events was not correct due to the window not being mapped
properly. Use QTest::qWaitForWindowActive() instead of
QTest::qWaitForWindowExposed() to ensure that.
Task-number: QTBUG-90016
Pick-to: 5.15
Pick-to: 6.0
Change-Id: Ie1bc4157e6d0e807d8530f70dcbd27b5e2fc813c
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
5849619607