Issue #3230148 by arthur_drupal: Toggle preview not working

      // Toggle the preview - We need to do this with drupalSettings as the

      // animation won't work if triggered by a form submit. It must occur after

      // the form is rendered.

      if (context.className === 'panels-ipe-block-plugin-form flip-container'

      if (context.id === 'panels-ipe-block-plugin-form-wrapper'

        && settings['panels_ipe']['toggle_preview']) {

        var $form = $('.ipe-block-form');