[ticket/11362] Correctly sanitise the directory path

We need to correctly remove ../ form the path if possible by removing the
previous folder aswell. Otherwise the finder is unable to locate /adm/style
directories in extensions as he is looking for /adm/../adm/style instead.

PHPBB3-11362
[ticket/11362] Add unit test for ../ in directory paths

PHPBB3-11362
[ticket/11485] add columns to styles table during updating schema before
updating the data

PHPBB3-10485
[ticket/11485] add revert_schema for the updated columns

PHPBB3-11485
[ticket/4412] Shorten long profile fields

Shorten long profile fields using CSS

PHPBB3-4412
[ticket/11491] Move file to correct directory

PHPBB3-11491
[ticket/11491] Fix class name of functional test

PHPBB3-11491
[ticket/11491] Add extension_acp_test.php to functional group

PHPBB3-11491
[ticket/11491] Fix path to the ext/ folder

PHPBB3-11491
[ticket/11491] Correctly remove the store/temp_ext/ directory after use

PHPBB3-11491
[ticket/11491] Only copy files from phpBB/ext/ the directory exists

PHPBB3-11491
[ticket/11491] Copy files back only if we saved them previously

PHPBB3-11491
[ticket/11275] Do not use document.write() for color palette

Replace document.write() for color palette function

PHPBB3-11275
[ticket/11275] Do not use spacer.gif in color picker

PHPBB3-11275
[ticket/10844] Add phpbb_root_path to phpbb_style_extension_path_provider

The phpbb_root_path needs to be removed from the style path, before giving
the path to the finder, because the finder prepends it later again and is
therefor unable to find style files when the root path is not ./

PHPBB3-10844
[ticket/10844] Make sure ext_path has no trailing slash

PHPBB3-10844
[ticket/10844] Add unit tests for different root_paths

PHPBB3-10844
[ticket/11488] Use correct base class in email notification method

In ticket/11451 this was not correctly changed to reflect the new class
phpbb_notifcation_method_messenger_base. Additionally, an undefined
variable error has been fixed in messenger_base.php (change should be
confirmed by bantu though).

PHPBB3-11488
[ticket/11493] add check for phpBB Debug in functional tests

PHPBB3-11493
[ticket/11493] add checks for Notice and Warning

PHPBB3-11493