[tx-robot] updated from transifex

apps/files/l10n/cs_CZ.php

apps/files/l10n/es.php

apps/files/l10n/it.php

apps/files/l10n/nl.php

apps/files/l10n/pt_PT.php

apps/files/l10n/sl.php

apps/files/l10n/zh_CN.php

l10n/cs_CZ/files.po

l10n/es/files.po

l10n/it/files.po

l10n/nl/files.po

l10n/pt_PT/files.po

l10n/sl/files.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