... At startup, spawn a copy process in main() and crash it at once. The
child process continues. (The fix was ineffective when the parent continued
and the child crashed.)
Re-activiation of the application is also needed or else the windows are
hidden behind other applications.
Another sleep when closing a project, to fix occurrences of the bug caused by
closing of a project window without saving changes.
... This poor imitation of the standard Mac Window menu only includes
Minimize and Zoom.
But this may be adequate for the complaints in Bug1198, when the yellow title
bar button is hidden and unreachable.
