Added zillions of #if wxUSE_XXX

Removed cmndlgs usage of wxSizer and constraints
  Changed occurences of wxConv_xxx to wxConvXxxx and
    changed some wxConvLibc to wxConvCurrent
  Added Unicode tests to typetests (not finished)
  Compile fix for wxString in Unicode mode - we have
   to use the "experimental" printf then, I guess.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2794 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/combobox.cpp

@@ -12,6 +12,9 @@
 #endif
 
 #include "wx/combobox.h"
+
+#if wxUSE_COMBOBOX
+
 #include "wx/settings.h"
 
 #include <wx/intl.h>
@@ -625,3 +628,4 @@ bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
              (window == GTK_COMBO(m_widget)->button->window ) );
 }
 
+#endif