implemented wxActivateEvent and restoring focus after a TLW that owned it was destroyed

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@46207 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dfb/toplevel.h

@@ -61,6 +61,8 @@ protected:
     // common part of all ctors
     void Init();
 
+    virtual void HandleFocusEvent(const wxDFBWindowEvent& event_);
+
 protected:
     wxString      m_title;