[ticket/7707] Add get_username_string() where possible

PHPBB3-7707
[ticket/7707] Remove unnecessary variables

PHPBB3-7707
[ticket/7707] Add get_username_string() once more

PHPBB3-7707
[ticket/7707] Remove unnecessary variables

PHPBB3-7707
[ticket/12333] Add Template Event overall_header_body_after

PHPBB3-12333
[ticket/12333] Change event name

PHPBB3-12333
[ticket/12339] Add Event core.page_header_after

PHPBB3-12339
[ticket/7707] Add comma to last entry of arrays

PHPBB3-7707
[ticket/10851] Set disallowed content to empty array if checking is disabled

The disallowed content defaults to a standard set of mimetype triggers by
default. If one doesn't want to check the attachments mimetype triggers then
we need to set the disallowed content to an empty array.

PHPBB3-10851
Merge branch 'ticket/10851' into ticket/10851-ascraeus
[ticket/10851] Add unit and functional tests for checking attachments

These tests will make sure that fileuploads now work as expected regarding
the check for disallowed content.

PHPBB3-10851
[ticket/12338] Add Template Event overall_footer_page_body_after

implement

PHPBB3-12338
[ticket/12339] more complete params and updated _since version

PHPBB3-12339
[ticket/12339] removed return var

need to learn more about events... evidently

PHPBB3-12339
[ticket/12327] Changing poll result-bars width from absolute to relative

PHPBB3-12327
[ticket/12327] Coding style fixes

PHPBB3-12327
[ticket/12327] Ajax fix

PHPBB3-12327
[ticket/10851] Request index instead of logging in and out in tests

PHPBB3-10851
Merge remote-tracking branch 'paybas/ticket/12339' into develop-ascraeus

* paybas/ticket/12339:
  [ticket/12339] removed return var
  [ticket/12339] more complete params and updated _since version
  [ticket/12339] Add Event core.page_header_after
[ticket/7707] Fix undefined variable: perm_from

PHPBB3-7707