Meta Slider - Enable CSS Transitions (Flex Slider)

/**
 * INSTALLATION: this code should be pasted into your theme's functions.php file.
 *
 * - Enable CSS transitions for Flex Slider.
 * - Fixes some issues with mobile browsers (slides go white after first complete rotation of slides)
 *
 * Compatibility: Flex Slider.
 */
function metaslider_flex_use_css($options, $slider_id, $settings) {
    $options['useCSS'] = "true";
    return $options;
}
add_filter('metaslider_flex_slider_parameters', 'metaslider_flex_use_css', 11, 3);