._TreeComboBoxTree {
    display: none;
    max-height: 400px;
}

._ComboBoxOptions ._TreeComboBoxTree {
    display: block;
}

._ComboBox._TreeComboBox + .button + ul {
    margin: 0px;
    padding-left: 10px;
}

._ComboBox._TreeComboBox + .button + ul li {
    padding: 0px;
    margin: 0px;
}

._ComboBox._TreeComboBox + .button + ul li a {
    display: inline-block;
    padding: 0px;
}