UI Nits: Geometry and setUnifiedTitleAndToolBar

The restore / set geometry for the config dialog and mainwindow
was 'adjusted' by setUnifiedTitleAndToolBarOnMac. This meant
that when restoring geometry at startup the window would gradually
decrease in size (by roughly 42 pixels).

src/ConfigDialog.cpp

@@ -17,9 +17,9 @@ ConfigDialog::ConfigDialog(QDir _home, Zones *_zones, MainWindow *mainWindow) :
     setAttribute(Qt::WA_DeleteOnClose);
 
 #ifdef Q_OS_MAC
-    setUnifiedTitleAndToolBarOnMac(true);
     QToolBar *head = addToolBar("Preferences");
-    setFixedSize(525,600);
+    setFixedSize(525,540);
+    setUnifiedTitleAndToolBarOnMac(true);
 #else
     QToolBar *head = addToolBar("Options");
     head->setMovable(false); // oops!