Secondary custom field ordering - wrong option value

[ernestmarcinko]

Describe the bug

The secondary custom field oldering uses the same option value as the primary, therefore it has no effect when used in combination with primary custom field oldering.

In backend/tabs/instance/general/ordering.php the lines:

        $o = new wpdreamsCustomSelect("orderby", __('Secondary ordering', 'ajax-search-pro'),
            array(
	            'selects' => array_merge($common_orders, array(
		            array('option' => __('Custom Field descending', 'ajax-search-pro'), 'value' => 'customfp DESC'),
		            array('option' => __('Custom Field  ascending', 'ajax-search-pro'), 'value' => 'customfp ASC')
	            )),
                'value' => $sd['orderby']
            ));

where the options should be:

    array('option' => __('Custom Field descending', 'ajax-search-pro'), 'value' => 'customfs DESC'),
    array('option' => __('Custom Field  ascending', 'ajax-search-pro'), 'value' => 'customfs ASC')