[tx-robot] updated from transifex

apps/files/l10n/pt_BR.php

apps/files_sharing/l10n/pt_BR.php

core/l10n/bn_BD.php

core/l10n/cs_CZ.php

core/l10n/de.php

core/l10n/de_DE.php

core/l10n/en_GB.php

core/l10n/es.php

core/l10n/eu.php

core/l10n/fi_FI.php

core/l10n/it.php

core/l10n/nl.php

core/l10n/pt_BR.php

core/l10n/tr.php

l10n/af_ZA/core.po

l10n/af_ZA/lib.po

l10n/ar/core.po

l10n/ar/files.po

l10n/ar/files_external.po

l10n/ar/files_trashbin.po