Added wxPopupWindow to GTK port, wxComboBox had to

be adapted a little but basically works not under
  GTK/Univ.
  I am pretty sure I forgot some file...


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10887 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/univ/combobox.h

@@ -270,6 +270,8 @@ public:
     virtual void Select(int n);
     virtual int GetSelection() const;
     void SetSelection(int n) { Select(n); }
+    
+    void SetStringSelection(const wxString& s) {  }
 
 protected:
     virtual int DoAppend(const wxString& item);