[tx-robot] updated from transifex

apps/files/l10n/eu.php

apps/files/l10n/ru.php

apps/files_external/l10n/ca.php

apps/files_external/l10n/cs_CZ.php

apps/files_external/l10n/ru.php

core/l10n/ca.php

core/l10n/cs_CZ.php

core/l10n/eu.php

core/l10n/it.php

core/l10n/pl.php

core/l10n/ru.php

core/l10n/uk.php

l10n/ca/core.po

l10n/ca/files_external.po

l10n/cs_CZ/core.po

l10n/cs_CZ/files_external.po

l10n/eu/core.po

l10n/eu/files.po

l10n/eu/settings.po

l10n/it/core.po