[ticket/12876] core.mcp_mcp_front.mcp_front_view_queue_postid_list_after

Adding the core.mcp_mcp_front.mcp_front_view_queue_topicid_list_after
event to mcp backend.

PHPBB3-12876
Merge pull request #2762 from brunoais/ticket/12876

[ticket/12876] core.mcp_mcp_front.mcp_front_view_queue_postid_list_after

* brunoais/ticket/12876:
  [ticket/12876] core.mcp_mcp_front.mcp_front_view_queue_postid_list_after