Add links and images in Discount bar

Enhance the discount bar with links and images.

// Allow to add hyperlink(a) and image(img) tags in Discount bar
add_filter('advanced_woo_discount_rules_allowed_html_elements_and_attributes', function($allowed_html) {
    $allowed_html['a'] = array('href' => array(), 'class' => array(), 'target' => array());
    $allowed_html['img'] = array('src' => array(), 'class' => array(), 'height' => array(), 'width' => array(), 'alt' => array());
    return $allowed_html;
});