[ticket/17369] Add forum id to approve action url for redirection

Added the forum_id to the approve action link which ensures that when
a topic is permanently deleted, the forum_id is present so that it can
be used in the redirection link to go to the previous forum. This addresses
a bug in which the forum_id is not provided and after deleting a topic, the
user will be taken to a 404 page as the forum id fallbacks to 0.

PHPBB-17369

Author: danieltj27

viewtopic.php

@@ -2071,7 +2071,7 @@
 		'U_EMAIL'		=> $user_cache[$poster_id]['email'],
 		'U_JABBER'		=> $user_cache[$poster_id]['jabber'],
 
-		'U_APPROVE_ACTION'		=> append_sid("{$phpbb_root_path}mcp.$phpEx", "i=queue&p={$row['post_id']}&redirect=" . urlencode(str_replace('&', '&', $viewtopic_url . '&p=' . $row['post_id'] . '#p' . $row['post_id']))),
+		'U_APPROVE_ACTION'	=> append_sid("{$phpbb_root_path}mcp.$phpEx", "i=queue&p={$row['post_id']}&f={$row['forum_id']}&redirect=" . urlencode(str_replace('&', '&', $viewtopic_url . '&p=' . $row['post_id'] . '#p' . $row['post_id']))),
 		'U_REPORT'			=> ($auth->acl_get('f_report', $forum_id)) ? $phpbb_container->get('controller.helper')->route('phpbb_report_post_controller', array('id' => $row['post_id'])) : '',
 		'U_MCP_REPORT'		=> ($auth->acl_get('m_report', $forum_id)) ? append_sid("{$phpbb_root_path}mcp.$phpEx", 'i=reports&mode=report_details&p=' . $row['post_id'], true, $user->session_id) : '',
 		'U_MCP_APPROVE'		=> ($auth->acl_get('m_approve', $forum_id)) ? append_sid("{$phpbb_root_path}mcp.$phpEx", 'i=queue&mode=approve_details&p=' . $row['post_id'], true, $user->session_id) : '',