Merge pull request #2432 from Nicofuma/ticket/11226

[ticket/11226] filespec::move_file() should error correctly

* Nicofuma/ticket/11226:
  [ticket/11226] Explicity set file_moved to false
  [ticket/11226] Add tests
  [ticket/11226] Use $user->lang()
  [ticket/11226] filespec::move_file() should error correctly
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/11226] Explicity set file_moved to false
  [ticket/11226] Add tests
  [ticket/11226] Use $user->lang()
  [ticket/11226] filespec::move_file() should error correctly
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12611] Remove phpBB Group copyright notice from .gifs
Merge pull request #2511 from Marshalrusty/ticket/12611

[ticket/12611] Remove phpBB Group copyright notice from .gifs

* Marshalrusty/ticket/12611:
  [ticket/12611] Remove phpBB Group copyright notice from .gifs
[ticket/11942] Don't change the reason to '' when hard deleting

PHPBB3-11942
[ticket/10073] Add a contact administrators page and refactor email forms.

The message to be displayed on top of the email form cannot be configured yet.

PHPBB3-10073
[ticket/10073] Replace board_contact mail with links to contact page

Error pages still contain the email address.

PHPBB3-10073
[ticket/10073] Add Admin contact email template

PHPBB3-10073
[ticket/10073] Use namespaces and fix all class names

PHPBB3-10073
[ticket/10073] Fix code sniffer complain

PHPBB3-10073
[ticket/10073] Global announcements have a forum_id now

PHPBB3-10073
[ticket/10073] Fix grammar in comment

PHPBB3-10073
[ticket/10073] Add doc blocks to new classes

PHPBB3-10073
[ticket/10073] Remove unneccessary todos he config switch is enough

PHPBB3-10073
[ticket/10073] Add @config_text to admin_form

PHPBB3-10073
[ticket/10073] Use get_username_string and correctly sprintf for languages

PHPBB3-10073
[ticket/10073] Fix title for "Email topic"

PHPBB3-10073
[ticket/10073] Fix missing language string

PHPBB3-10073
[ticket/10073] Fix invalid type hint

PHPBB3-10073
[ticket/10073] Add configs for contact info text

PHPBB3-10073