Issue #3268122 by andy_w, mathilde_dumond, Berdir, ilkkave: Button "Add above"...

    // Find delta for row without interference of unrelated table rows.

    var $anchorRow = $button.closest('tr');

    var delta = $anchorRow.parent().find('> .draggable').index($anchorRow);

    // If the form table has a layout wrapper use that (see claro / gin).

    var $table = $button.closest('.field-multiple-table');

    var $layer_wrapper = $table.closest('.layer-wrapper');

    $table = $layer_wrapper.length > 0 ? $layer_wrapper : $table;

    // We need the siblings function to avoid finding the 'Add paragraph' button inside a container.

    var $add_more_wrapper = $button.closest('.field-multiple-table').siblings('.clearfix,.form-actions').find('.paragraphs-add-wrapper');

    var $add_more_wrapper = $table.siblings('.clearfix,.form-actions,.multiple-value-form-actions').find('.paragraphs-add-wrapper');

    // Set delta before opening of dialog.

    $add_more_wrapper.find('.paragraph-type-add-delta').val(delta);

        var $actions = $(this);

        if ($actions.closest('.paragraph-top').hasClass('add-above-on')) {

          var $add_above = false;

          var $add_more_wrapper = $actions.closest('.field-multiple-table').siblings('.clearfix,.form-actions').find('.paragraphs-add-wrapper');

          // If the form table has a layout wrapper use that (see claro / gin).

          var $table = $actions.closest('.field-multiple-table');

          var $layer_wrapper = $table.closest('.layer-wrapper');

          $table = $layer_wrapper.length > 0 ? $layer_wrapper : $table;

          var $add_more_wrapper = $table.siblings('.clearfix,.form-actions,.multiple-value-form-actions').find('.paragraphs-add-wrapper');

          // The Add Above button is added when the add mode is modal or when

          // there is only one add button in the other add modes.

          if ($add_more_wrapper.find('.paragraph-type-add-delta').hasClass('modal') || $add_more_wrapper.find('.field-add-more-submit').length === 1) {