Fix for TextCtrl problem as reported by Vegh

Move definition of wxMenuItem to /gtk/menuitem.h
  Radical change of how to insert a child into a
    paren window. As C++ doesn't have any VMT in
    a class's consructor, I have to use a callback.
  Fixed culumn resizing bug in wxListCtrl
  Fixed menu height bug in MDI code


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@955 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/radiobox.cpp

@@ -159,6 +159,9 @@ bool wxRadioBox::Create( wxWindow *parent, wxWindowID id, const wxString& title,
   if (newSize.y == -1) newSize.y = height;
   SetSize( newSize.x, newSize.y );
   
+  gtk_myfixed_put( GTK_MYFIXED(m_parent->m_wxwindow), m_widget, m_x, m_y );
+  gtk_widget_set_usize( m_widget, m_width, m_height );
+  
   PostCreation();
   
   SetLabel( title );