[ticket/12270] Corrent post and topic approval notification message

When you submit a post with needed approval (say user A), and then
it gets approved by another user (user B), a subscribed user (user C)
to that forum would receive a notification indicating:
-A has replied to topic 'New Topic' in the forum 'xyz'.
The expected result would be:
-A has posted a new topic 'New topic' in the forum 'xyz'.
This has fixed by adding a TOPIC_ID template variable to
mcp_post.html and, in there, depending if the first post is the topic's
first post or not, add a input's with name topic_id_list[] or
post_id_list[] and then the respective value (TOPIC_ID or POST_ID).

PHPBB3-12270

phpBB/includes/mcp/mcp_queue.php

@@ -316,6 +316,7 @@ class mcp_queue
 					'POST_IP'				=> $post_info['poster_ip'],
 					'POST_IPADDR'			=> ($auth->acl_get('m_info', $post_info['forum_id']) && request_var('lookup', '')) ? @gethostbyaddr($post_info['poster_ip']) : '',
 					'POST_ID'				=> $post_info['post_id'],
+					'TOPIC_ID'				=> $post_info['topic_id'],
 					'S_FIRST_POST'			=> ($post_info['topic_first_post_id'] == $post_id),
 
 					'U_LOOKUP_IP'			=> ($auth->acl_get('m_info', $post_info['forum_id'])) ? append_sid("{$phpbb_root_path}mcp.$phpEx", 'i=queue&mode=approve_details&f=' . $post_info['forum_id'] . '&p=' . $post_id . '&lookup=' . $post_info['poster_ip']) . '#ip' : '',