[ticket/13077] Move extension module to the top of the Customise tab

PHPBB3-13077
Merge pull request #2991 from nickvergessen/ticket/13077

[ticket/13077] Move extension module to the top of the Customise tab

* nickvergessen/ticket/13077:
  [ticket/13077] Move extension module to the top of the Customise tab
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/13077] Move extension module to the top of the Customise tab