Bug fix for Mac OS X - the main window is no longer started maximised.
This was reported by Jack Howarth at https://mail.gna.org/public/relax-users/2012-03/msg00053.html
(Message-id: <20120326161412.GA30924@...>). The thread continues at
https://mail.gna.org/public/relax-users/2012-04/msg00003.html (Message-id:
<CAED9pY9uuVyYSBP+9E2yPE7AydnP=BK6JBsmWw61gqo5zj+rzw@...>).
This maximisation is a problem for certain, though not all, Mac OS X systems.
