Добавить подчёркивание в WYSIWYG WordPress, Woocommerce

//-------WYSIWYG подчёркивание--------
function custom_mce_buttons() {
    add_filter("mce_buttons_2", "add_underline_button");
}
function add_underline_button($buttons) {
    array_push($buttons, "underline");
    return $buttons;
}add_action("admin_init", "custom_mce_buttons");

//-------WYSIWYG подчёркивание--------
function custom_mce_buttons() {
    add_filter("mce_buttons_2", "add_underline_button");
}
function add_underline_button($buttons) {
    array_push($buttons, "underline");
    return $buttons;
}add_action("admin_init", "custom_mce_buttons");

add_filter( 'jet-form-builder/fields/wysiwyg-field/config', function ( $wysiwyg_config ) {
    $wysiwyg_config['tinymce']['toolbar1'] .= ',underline';
    return $wysiwyg_config;
});

add_filter( 'jet-form-builder/fields/wysiwyg-field/config', function ( $wysiwyg_config ) {
    $wysiwyg_config['tinymce']['toolbar1'] .= ',underline';
    return $wysiwyg_config;
});