[ticket/12365] Do not crop image attachments at 350px

PHPBB3-12365
Merge remote-tracking branch 'VSEphpbb/ticket/12365' into develop-ascraeus

* VSEphpbb/ticket/12365:
  [ticket/12365] Do not crop image attachments at 350px
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12365] Do not crop image attachments at 350px