[ticket/12791] String profile fields do not use links ...

smilies and line breaks in memberlist

The value is overwritten with the contact value
Added aditional check if the field is a contact so we don't overwrite it.

PHPBB3-12791
[ticket/12791] Changed the if check

Removed unneeded variable

PHPBB3-12791
[ticket/12793] String '0' does not display for string profile fields

See https://github.com/phpbb/phpbb/pull/2647#discussion_r14503051

PHPBB3-12793
[ticket/12793] Changing get_profile_contact_value to get_profile_value_raw

Changing the return to get_profile_value_raw

PHPBB3-12793
[ticket/12793] Tests (added and changed)

changed behavieur of 0 as in and added 0 as string test

PHPBB3-12793
[ticket/12857] Add template events breadcrumbs_before/after

PHPBB3-12857
[ticket/12857] Add missing template events breadcrumb_prepend

To insert links after site-home

PHPBB3-12857
[ticket/12883] Do not use basename() to get the search class in tidy_search

PHPBB3-12883
[ticket/12884] Add core event to the function upload_attachment()

Add core event to the function upload_attachment()
in functions_posting.php to provide ability for extensions
to perform additional actions on uploaded files, like resizing etc.

PHPBB3-12884
[ticket/12656] Use lang keys for CLI command descriptions

PHPBB3-12656
[ticket/12656] Use lang keys for all CLI strings

PHPBB3-12656
[ticket/12883] Remove pointless comments

PHPBB3-12883
[ticket/12887] Fix Typo: offest -> offset

PHPBB3-12887
[ticket/12857] Clarify events.md on difference between PS and SS2 breadcrumbs

PHPBB3-12857
[ticket/12857] Add header/footer distinction for subsilver2 events

PHPBB3-12857
[ticket/12656] Use utf8 ’ instead of escaping '

PHPBB3-12656
[ticket/12656] Fix typo

PHPBB3-12656
Merge remote-tracking branch 'paybas/ticket/12857' into develop-ascraeus
[ticket/12656] Fix syntax in language file

PHPBB3-12656
Merge pull request #2773 from bantu/ticket/12887

[ticket/12887] Fix Typo: offest -> offset