Fix selected_variables_only option

In Dynare 4.4.3, we have in dynare_estimation_1

    for i=bayestopt_.smoother_saved_var_list'
        i1 = dr.order_var(bayestopt_.smoother_var_list(i));
        eval(['oo_.SmoothedVariables.' deblank(M_.endo_names(i1,:)) ' = ' ...
                            'atT(i,:)'';']);

But bayestopt_.smoother_saved_var_list only saves the index of the variable in bayestopt_.smoother_var_list, not in the decision rules themselves. Therefore, we have to select atT(bayestopt_.smoother_var_list(i),:) instead of atT(i,:) if bayestopt_.smoother_var_list is not equal to bayestopt_.smoother_saved_var_list, which happens with selected_variables_only In master the same problem has been ported to write_smoother_results

@MichelJuillard @stepan-a Should we try to fix this or should we get rid of the selected_variables_only option?