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/textctrl.cpp

@@ -119,6 +119,10 @@ bool wxTextCtrl::Create( wxWindow *parent, wxWindowID id, const wxString &value,
   if (newSize.y == -1) newSize.y = 26;
   SetSize( newSize.x, newSize.y );
 
+  m_parent->AddChild( this );
+
+  (m_parent->m_insertCallback)( m_parent, this );
+  
   PostCreation();
 
   if (bMultiLine) 
@@ -136,6 +140,7 @@ bool wxTextCtrl::Create( wxWindow *parent, wxWindowID id, const wxString &value,
   {
     gint tmp = 0;
     gtk_editable_insert_text( GTK_EDITABLE(m_text), value, value.Length(), &tmp );
+    SetInsertionPointEnd();
   }
 
   if (style & wxTE_READONLY)