[tx-robot] updated from transifex

apps/files/l10n/fr.php

apps/files/l10n/nb_NO.php

apps/files/l10n/nl.php

apps/files/l10n/ru.php

apps/files/l10n/vi.php

apps/files_encryption/l10n/vi.php

apps/files_encryption/l10n/zh_CN.php

apps/files_external/l10n/vi.php

apps/files_sharing/l10n/vi.php

apps/files_versions/l10n/ru.php

apps/files_versions/l10n/vi.php

apps/user_ldap/l10n/el.php

core/l10n/ru.php

l10n/af/files.po

l10n/ar/files.po

l10n/ar_SA/files.po

l10n/bg_BG/files.po

l10n/ca/files.po

l10n/cs_CZ/files.po

l10n/da/files.po