Get rid of lots of ifdef Q_OS_MAC for shortcuts.

Using a central enum now.

Change-Id: I20d88c9a3f8c62cf33e4b89a3442269f71918b06
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/coreplugin/mainwindow.h

@@ -227,10 +227,8 @@ private:
     QAction *m_optionsAction;
     QAction *m_toggleSideBarAction;
     QAction *m_toggleFullScreenAction;
-#ifdef Q_OS_MAC
     QAction *m_minimizeAction;
     QAction *m_zoomAction;
-#endif
 
     QToolButton *m_toggleSideBarButton;
     QColor m_overrideColor;