su-lightbox magnificPopup extra options?

hey,

i packed an form from my own plugin into [su_lightbox]-Shortcode.
this form have several fields and dynamic content (multiple views)
all works perfectly.
one thing i didnt get to work was to set the focus to an input field after the lightbox was opened.

Nothing worked here for me, i tried jQuery.focus(), .click() and several other stuff.
finally i worked through your code and found, that you use the magnificPopup-extension.
i searched in the documentation and found the solution for my problem.
i just need to add an extra option in the magnificPopup initialization-call named “focus”. (see https://dimsemenov.com/plugins/magnific-popup/documentation.html#focus )

well, to keep your whole plugin updatable i moved a short js-block into my template

jQuery(document).ready(function() {

    // need a timeout here
    // todo rj: do better
    setTimeout(stw_update_lightbox, 10);
});

function stw_update_lightbox() {

    // detach current clickHandler from SU-Plugin
    jQuery(document).off('click', '.su-lightbox');

    // re-attach clickHandler with extra option-value for focussing ms-inputs
    jQuery(document).on('click', '.su-lightbox', function(e) {
        e.preventDefault();
        e.stopPropagation();
        if (jQuery(this).parent().attr('id') === 'su-generator-preview') jQuery(this).html(su_other_shortcodes.no_preview);
        else {
            var type = jQuery(this).data('mfp-type');
            jQuery(this).magnificPopup({
                type: type,
                tClose: su_magnific_popup.close,
                tLoading: su_magnific_popup.loading,
                gallery: {
                    tPrev: su_magnific_popup.prev,
                    tNext: su_magnific_popup.next,
                    tCounter: su_magnific_popup.counter
                },
                image: {
                    tError: su_magnific_popup.error
                },
                ajax: {
                    tError: su_magnific_popup.error
                },
                focus: '.ms-input-focus:not(:hidden)'
            }).magnificPopup('open');
        }
    });
}

question:
is there another way to add an extra option to this?
f.e. focus: '.ms-input-focus:not(:hidden)'

Greetings