Ingo Schommer 559a4e5899 ENHANCEMENT Moved i18n::get_existing_content_languages() to correct namespace in Translatable::get_existing_content_languages().
BUGFIX Using SQL DISTINCT in get_existing_content_languages()

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/cms/branches/2.3@69891 467b73ca-7a2a-4603-9d3b-597d59a354a9
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