[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/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 pull request #2350 from Nicofuma/ticket/11480

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

* Nicofuma/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
Merge pull request #2784 from Nicofuma/ticket/11480-ascraeus

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

* Nicofuma/ticket/11480-ascraeus:
  [ticket/11480] Header file
  [ticket/11480] Fix unit tests
  [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
Merge branch 'develop-olympus' into develop-ascraeus

* develop-olympus: