preparing fix for non-bundled osx apps, see #15613 with fix on trunk

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@75143 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/app.h

@@ -143,6 +143,10 @@ public:
     virtual void         MacNewFile() ;
     // in response of a reopen-application apple event
     virtual void         MacReopenApp() ;
+    
+    // override this to return false from a non-bundled console app in order to stay in background ...
+    virtual bool         OSXIsGUIApplication() { return true; }
+
 #if wxOSX_USE_COCOA_OR_IPHONE
     // immediately before the native event loop launches
     virtual void         OSXOnWillFinishLaunching();