Issue #3271947 by t_d_d, RenatoG: plain colorbox style is using wrong class for element hiding

    attach: function (context, settings) {

      $(context).bind('cbox_complete', function () {

        // Make all the controls invisible.

        $('#cboxCurrent, #cboxSlideshow, #cboxPrevious, #cboxNext', context).addClass('element-invisible');

        $('#cboxCurrent, #cboxSlideshow, #cboxPrevious, #cboxNext', context).addClass('visually-hidden');

        // Replace "Close" with "×" and show.

        $('#cboxClose', context).html('\u00d7').addClass('cbox-close-plain');

        // Hide empty title.