Make it easier to switch between native and generic sample for testing purposes.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44131 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/listctrl/listtest.h

@@ -136,6 +136,7 @@ protected:
     void OnFreeze(wxCommandEvent& event);
     void OnThaw(wxCommandEvent& event);
     void OnToggleLines(wxCommandEvent& event);
+    void OnToggleMacUseGeneric(wxCommandEvent& event);
 
     void OnUpdateShowColInfo(wxUpdateUIEvent& event);
     void OnUpdateToggleMultiSel(wxUpdateUIEvent& event);
@@ -203,6 +204,7 @@ enum
     LIST_FREEZE,
     LIST_THAW,
     LIST_TOGGLE_LINES,
+    LIST_MAC_USE_GENERIC,
 
     LIST_CTRL                   = 1000
 };