[ticket/12982] Refactoring: made most JS nice.

PHPBB3-12982
[ticket/12982] Refactoring: made JS in adm nice

PHPBB3-12982
[ticket/12982] Refactoring: Cleaned up phpbb.search

PHPBB3-12982
[ticket/12982] Refactoring: Cleaned up forum_fn.js

PHPBB3-12982
[ticket/12982] Refactoring: Cleaned up crazy insert users stuff

PHPBB3-12982
[ticket/13005] Add event to display_forums() to modify category template data

While there're events to modify/add FORUM_POST/FORUM_LINK template data,
such an event is missing for FORUM_CAT forum type.

PHPBB3-13005
[ticket/13006] Add variables to the 'core.modify_quickmod_actions' event

Add $quickmod and $action variables
for the 'core.modify_quickmod_actions' event trigerring
to avoid of using global operator in corresponding extensions.

PHPBB3-13006
[ticket/13051] Fix viewonline event, remove template data

PHPBB3-13051
[ticket/13051] Add a new core event to handle the template array

PHPBB3-13051
[ticket/13052] Remove additional parameter from check_form_key()

PHPBB3-13052
[ticket/13052] Fix appearances with multiple parameters

PHPBB3-13052
[ticket/13052] Use request class instead of $_POST and request_var()

PHPBB3-13052
Merge pull request #2935 from nickvergessen/ticket/13052

Ticket/13052 Remove additional parameter from check_form_key()

* nickvergessen/ticket/13052:
  [ticket/13052] Use request class instead of $_POST and request_var()
  [ticket/13052] Fix appearances with multiple parameters
  [ticket/13052] Remove additional parameter from check_form_key()
[ticket/12976] Correctly use plurals for attachment count in UCP navigation

PHPBB3-12976
[ticket/13051] Rename new event core.viewonline_modify_user_row

PHPBB3-13051
[ticket/13051] Fix core event name

PHPBB3-13051
Merge pull request #2934 from VSEphpbb/ticket/13051

[ticket/13051] Fix viewonline event (recently broken) and add a new core event
[ticket/13052] Restore timespan parameter for check_form_key()

PHPBB3-13052
[ticket/12982] Refactoring: Killed undescriptive variables

PHPBB3-12982
[ticket/13042] Remove unused variables

PHPBB3-13042