PIMCORE-1607 missing translations in the pull request

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2757 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
version ...

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2758 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
PIMCORE-1944 - Documents: QR Code Button in Preview Tab for easier Mobile testing

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@2759 1f8fe7d8-47f0-464c-8d0a-336f4953ab05