[ticket/13739] Add template core event posting_poll_body_options_after
Template event added for the poll options while posting a topic
so that you may add additional options for polls.

PHPBB3-13739

[ticket/13739] Add template core event posting_poll_body_options_after
Fixing if else construct in prosilver so that the event is placed correctly

PHPBB3-13739

[ticket/13739] Add template core event posting_poll_body_options_after
Fixing order of if statement and event

PHPBB3-13739

[ticket/13518] Add core event to markread() in functions.php
Adding core event core.markread_before to to funtion markread()
in functions.php, so that you now are able to add additional
stuff inside the markread process, for example notifications designed
in extensions.

PHPBB3-13518

[ticket/13537] Add core events on mcp_queue for approval and disapproval
Events added for the functions approve_posts(), approve_topics()
and disapprove_posts() in mcp_queue.php, so that you can send notifications
during approval and disapproval.

PHPBB3-13537

[ticket/13532] Add core event to get_unread_topics() in functions.php
Adding core event core.get_unread_topics_modify_sql to to funtion
get_unread_topics() in functions.php, so that you now are able to modify
the sql query that retrieves the unread topics.

PHPBB3-13532

[ticket/13428] Add core events to memberlist.php for teampage
PHPBB3-13428