[ticket/11917] Hide OAuth UCP Module when OAuth is not the selected backend

PHPBB3-11917
[ticket/11917] Move OAuth Module to the bottom while installing

PHPBB3-11917
Merge remote-tracking branch 'github-nickvergessen/ticket/11917' into develop-ascraeus

* github-nickvergessen/ticket/11917:
  [ticket/11917] Move OAuth Module to the bottom while installing
  [ticket/11917] Hide OAuth UCP Module when OAuth is not the selected backend

Conflicts:
	phpBB/install/install_install.php