[ticket/10729] Update post_edit_user when user being deleted

PHPBB3-10729
[ticket/10729] Update message_edit_user when user being deleted

PHPBB3-10729
Merge branch 'ticket/10729' into ticket/10729-2

Conflicts:
	phpBB/includes/functions_user.php
[ticket/10729] Update *_delete_user when user being deleted

PHPBB3-10729
[ticket/13027] round to floor

PHPBB3-13027
[ticket/13045] Remove Pragma headers

PHPBB3-13045
[ticket/13055] Add string profile fields validation options to support unicode

PHPBB3-13055
[ticket/13055] Add UTF-8 string tests for profile fields validation options

PHPBB3-13055
[prep-release-3.1.0-RC4] Update version to 3.1.0-RC4
[prep-release-3.1.0-RC4] Add migration for 3.1.0-RC4
[prep-release-3.1.0-RC4] Prepare Changelog
[prep-release-3.1.0-RC4] Add changelog for 3.1.0-RC4
[prep-release-3.1.0-RC4] Update phpBB Version for RC4 development
Merge branch 'prep-release-3.1.0-RC4' into develop-ascraeus

* prep-release-3.1.0-RC4:
  [prep-release-3.1.0-RC4] Update phpBB Version for RC4 development
  [prep-release-3.1.0-RC4] Add changelog for 3.1.0-RC4
  [prep-release-3.1.0-RC4] Prepare Changelog
  [prep-release-3.1.0-RC4] Add migration for 3.1.0-RC4
  [prep-release-3.1.0-RC4] Update version to 3.1.0-RC4
[ticket/13080] Remove nowrap from dd in responsive

PHPBB3-13080
[ticket/13080] Fix mediaqueries formating

open { are should not to be on new lines for
media queries per spec, causes code highlight
issues in reputible code editors

PHPBB3-13080
[ticket/13082] Replace float by text-align

PHPBB3-13082
[ticket/13082] move style to css file

PHPBB3-13082
[ticket/13085] Fix typo in oauth.php

PHPBB3-13085
[ticket/13082] Join classes

PHPBB3-13082