Change default bookings admin table defaults

<?php
/**
 * Changes the default booking status being searched for on booking admin tables, and can be extended to change other default features.
 * For installation instructions, see here - http://wp-events-plugin.com/tutorials/how-to-safely-add-php-code-to-wordpress/
 * @param EM_Bookings_Table $EM_Bookings_Table
 */
function my_custom_booking_table_status_default( $EM_Bookings_Table ){
    if( !isset($_REQUEST['status']) ) $EM_Bookings_Table->status = 'confirmed';
}
add_action('em_bookings_table_header', 'my_custom_booking_table_status_default', 10, 1);