[tx-robot] updated from transifex

apps/files_external/l10n/el.php

core/l10n/el.php

core/l10n/it.php

core/l10n/sl.php

core/l10n/sv.php

core/l10n/th_TH.php

l10n/el/core.po

l10n/el/files_external.po

l10n/it/core.po

l10n/sl/core.po

l10n/sv/core.po

l10n/templates/core.pot

l10n/templates/files.pot

l10n/templates/files_encryption.pot

l10n/templates/files_external.pot

l10n/templates/files_sharing.pot

l10n/templates/files_versions.pot

l10n/templates/lib.pot

l10n/templates/settings.pot

l10n/templates/user_ldap.pot