Added support for using OS X' full screen API (available since OS X 10.7).

Added EnableFullScreenView() to have a full screen button in the title bar and also allowing ShowFullScreen() to make use of the newer full screen API.

See #14357.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76495 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/core/private.h

@@ -867,6 +867,8 @@ public :
 
     virtual void ShowWithoutActivating() { Show(true); }
 
+    virtual bool EnableFullScreenView(bool enable) = 0;
+
     virtual bool ShowFullScreen(bool show, long style)= 0;
 
     virtual void RequestUserAttention(int flags) = 0;