[ticket/12930] core.ucp_pm_compose_compose_pm_quotepost_query_after

Adding the core.ucp_pm_compose_compose_pm_quotepost_query_after
event to ucp backend.

PHPBB3-12930
[ticket/12929] core.ucp_pm_compose_compose_pm_basic_info_query_before

Adding the core.ucp_pm_compose_compose_pm_basic_info_query_before
event to mcp backend.

PHPBB3-12929
[ticket/12929] Update to RC4

PHPBB3-12929
[ticket/12930] Update to RC4

PHPBB3-12930
[ticket/12929] Adding more variables to event.

More variables added that may be useful to events at this stage.

PHPBB3-12929
[ticket/12930] Adding more variables to the event

More variables, according to comments, were added to the event.

PHPBB3-12930
[ticket/12929] Fixing event comment block and variable

PHPBB3-12929
[ticket/12930] Fixing event comment block and variable

According to comments on pull request

PHPBB3-12930
[ticket/13077] Move extension module to the top of the Customise tab

PHPBB3-13077
[ticket/12930] BUMP to RC5

PHPBB3-12930
[ticket/12929] BUMP to RC5

PHPBB3-12929
[ticket/13033] Fix "Duplicate entry 'notification.type.*' for key 'type'"

Caused by the solution of PHPBB3-12990

PHPBB3-13033
[ticket/13025] Add button template events

PHPBB3-13025
[ticket/13025] rc4 -> rc5

PHPBB3-13025
[ticket/11224] Revert Revert "Merge pull request #2460 from ticket/11224"

This reverts commit 40cd7570e6f4da7cc60d83a3e99c72a2fb99e3f7.
[ticket/11224] Updates tests

PHPBB3-11224
[ticket/13025] Make RC uppercase

PHPBB3-13025
[ticket/13025] Correct events in subsilver2 viewforum_body

PHPBB3-13025
Merge pull request #3017 from nickvergessen/ticket/13033

[ticket/13033] Fix "Duplicate entry 'notification.type.*' for key 'type'"
[ticket/13134] Add core event to the root of the function display_forums()

PHPBB3-13134