Rigify show additional layer in picker

generate.py

    ''' old code
    # Create list of layer name/row pairs
    layer_layout = []
    for l in metarig.data.rigify_layers:
        print( l.name )
        layer_layout += [(l.name, l.row)]
    end old code'''

    # new code
    # Create list of layer name/row pairs
    layer_layout = []
    layer_count = 0
    for l in metarig.data.rigify_layers:
        print( l.name )
        layer_layout += [(l.name, l.row)]

        additional_layer_start = 18 if isPitchipoy(metarig) else 17
        if layer_count > additional_layer_start and len(l.name) > 0:
            #metarig may have white space name
            if len( l.name.replace(' ','') ) > 0:
                vis_layers[layer_count] = True
        layer_count += 1