I call the windowmanager like this
viewmodel is a screen and the view is window (not user control).
ShowDialog seems to be using the properties from the window, like ShowInTaskbar. But not the Title.
WindowManager seems to be setting Title to viewmodel.ToString().
After some tryouts, it seems I should set DisplayName in the viewmodel.
But it seems a bit wrong to ignore the window title. Is this the way CM works or a tiny bug?