The tests uses QWindow::requestActivate() to verify that a window does
not become active when a modal dialog is running, but on macOS we have
no guards for this, so the test can potentially fail.
In addition, due to a bug in QCocoaEventDispatcher, we end up waiting
5 seconds for that failure to manifest.
Task-number: QTBUG-61965
Task-number: QTBUG-61964
Change-Id: I2f1b62d953e9b6dabf2df0c3023564f27919c498
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
af00fe5d89