[ticket/11480] PM : "Unknown folder" returned when inbox folder is full

https://tracker.phpbb.com/browse/PHPBB3-11480

PHPBB3-11480
[ticket/11480] Add functionnal test

PHPBB3-11480
[ticket/11480] Fix typos

PHPBB3-11480
[ticket/11480] Fix the double spaces in phpbb_functional_test_case

PHPBB3-11480
[ticket/12801] Add topic_poster to load_drafts' topics query

PHPBB3-12801
[ticket/12800] core.functions_display.display_user_activity.actives_after

Adding core.functions_display.display_user_activity.actives_after

PHPBB3-12800
[ticket/12801] Add core.functions_posting.load_drafts_draft_list_results

Adding event core.functions_posting.load_drafts_draft_list_results

PHPBB3-12801
[ticket/12864] Add template event to header after stylesheets

https://tracker.phpbb.com/browse/PHPBB3-12864

PHPBB3-12864
[ticket/12801] missing $phpbb_dispatcher as a global

PHPBB3-12801
[ticket/12800] Missing $phpbb_dispatcher as a global

PHPBB3-12800
[ticket/12800] removed superfulous tab character

PHPBB3-12800
[ticket/12864] Update event docs

PHPBB3-12864
[ticket/12895] Rename user style setting to resolve conflict with style param

The style URL parameter, i.e. style=1, will conflict with the user's style
setting due to it also being named style. This patch with solve this conflict.

PHPBB3-12895
[ticket/11480] Move the test into get_folder()

PHPBB3-11480
Merge branch 'ticket/11480' into ticket/11480-ascraeus

* ticket/11480:
  [ticket/11480] Move the test into get_folder()
  [ticket/11480] Fix the double spaces in phpbb_functional_test_case
  [ticket/11480] Fix typos
  [ticket/11480] Add functionnal test
  [ticket/11480] PM : "Unknown folder" returned when inbox folder is full

Conflicts:
	tests/test_framework/phpbb_functional_test_case.php
[ticket/11480] Fix unit tests

PHPBB3-11480
[ticket/11480] Header file

PHPBB3-11480
Merge remote-tracking branch 'VSE/ticket/12864' into develop-ascraeus
Merge branch 'develop-ascraeus' into develop
[ticket/12880] Changed name change @since as requested

Changed name to core.display_user_activity_modify_actives as requested

Changed @since to 3.1.0-RC3 because RC2 is already out.

PHPBB3-12880