[ticket/13328] add core.mcp_view_forum_modify_sql

https://tracker.phpbb.com/browse/PHPBB3-13328

PHPBB3-13328
[ticket/13328] fix CS

https://tracker.phpbb.com/browse/PHPBB3-13328

PHPBB3-13328
Merge pull request #3131 from omniError/ticket/13328

[ticket/13328] add core.mcp_view_forum_modify_sql