IPS5/IC5/简化发帖代码修改

1. 修改根目录/static/templates/forums_front_index.php 的2624行和6236行

2. 修改根目录/applications/forums/modules/front/forums/forums.php 的626-632行

//new
$fixed_id = 41;
if ( !isset( Request::i()->id ) ) {
    Request::i()->id = $fixed_id;
}