Temp fix - tribe_is_week() detection during ajax requests

tribe-is-week-fix.php

/**
 * A bug prevents tribe_is_week() from working reliably during ajax loads of
 * week view - this presents a few problems including the Show First Recurring
 * Instance setting being applied incorrectly to that view.
 *
 * This provides a temporary fix until it can be addressed in a future update
 * of Events Calendar PRO.
 *
 * @see    <http://theeventscalendar.com/support/forums/topic/week-view-requires-reloadrefresh-to-show-all-recurring-events/>
 * @param  bool $status
 * @return bool
 */
function fix_37301_ajax_tribe_is_week( $status ) {
	// Don't interfere if it is not a frontend ajax request
	$front_ajax = is_admin() && defined( 'DOING_AJAX' ) && DOING_AJAX;
	if ( ! $front_ajax ) return $status;

	// We can't rely on the $wp_query global here (at least not in
	// 3.10) so let's fall back on the $_REQUEST superglobal instead
	return ( 'tribe_week' === @$_REQUEST['action'] );
}

add_filter( 'tribe_is_week', 'fix_37301_ajax_tribe_is_week' );