1. wxRadioBox event generation fixed

2. significantly expanded and enchanced listbox sample
3. wxTextCtrl::IsModified() implemented
4. wxRadioBox button layout fixed once again
5. wxTextCtrl::SetValue() refresh bug fixed
6. wxListCtrl doesn't keep invalid selection after Delete()


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxUNIVERSAL@8493 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/univ/window.h

@@ -163,6 +163,9 @@ public:
     virtual void Refresh(bool eraseBackground = TRUE,
                          const wxRect *rect = (const wxRect *) NULL);
 
+    // we refresh the window when it is dis/enabled
+    virtual bool Enable(bool enable = TRUE);
+
     // remember that the font/colour was changed
     virtual bool SetBackgroundColour(const wxColour& colour);
     virtual bool SetForegroundColour(const wxColour& colour);