[ticket/12388] Fix translation of log entries without additional log data

PHPBB3-12388
[ticket/12388] Add tests for lang() use on log actions without data

PHPBB3-12388
Merge pull request #2286 from nickvergessen/ticket/12388

[ticket/12388] Fix translation of log entries without additional log data

* nickvergessen/ticket/12388:
  [ticket/12388] Add tests for lang() use on log actions without data
  [ticket/12388] Fix translation of log entries without additional log data
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12388] Add tests for lang() use on log actions without data
  [ticket/12388] Fix translation of log entries without additional log data
Merge branch 'ticket/lucifer4o/12344' into develop-ascraeus

* ticket/lucifer4o/12344:
  [ticket/12344] Add core.pm_submit_before to function submit_pm
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12344] Add core.pm_submit_before to function submit_pm