MB settings page - style no-boxes

<?php
// Register a theme options page
add_filter( 'mb_settings_pages', 'my_settings_pages' );

function my_settings_pages ( $settings_pages ) {
    $settings_pages[] = array(
        'id'          => 'pencil',
        'option_name' => 'pencil',
        'menu_title'  => 'Pencil',
        'icon_url'    => 'dashicons-edit',
        'style'       => 'no-boxes',
        'columns'     => 1,
    );
    return $settings_pages;
}

// Register meta boxes and fields for settings page
add_filter( 'rwmb_meta_boxes', 'fields_settings_page' );

function fields_settings_page ( $meta_boxes ) {
    $meta_boxes[] = array(
        'id'             => 'general',
        'title'          => 'General',
        'settings_pages' => 'pencil',
        // 'tab'            => 'general',
        'fields' => array(
            array(
                'name' => 'Logo1',
                'id'   => 'logo',
                'type' => 'file_input',
            ),
            array(
                'name'    => 'Layout',
                'id'      => 'layout',
                'type'    => 'image_select',
                'options' => array(
                    'sidebar-left'  => 'https://i.imgur.com/Y2sxQ2R.png',
                    'sidebar-right' => 'https://i.imgur.com/h7ONxhz.png',
                    'no-sidebar'    => 'https://i.imgur.com/m7oQKvk.png',
                ),
            ),
        ),
        'style' => 'seamless'
    );
    return $meta_boxes;
}