[tx-robot] updated from transifex

apps/files_sharing/l10n/de.php

apps/files_sharing/l10n/de_DE.php

apps/files_sharing/l10n/ja.php

apps/files_sharing/l10n/sl.php

core/l10n/sl.php

l10n/af_ZA/core.po

l10n/ar/core.po

l10n/ar/files_external.po

l10n/ar/settings.po

l10n/ast/core.po

l10n/ast/files_external.po

l10n/ast/settings.po

l10n/bg_BG/core.po

l10n/bn_BD/core.po

l10n/bs/core.po

l10n/ca/core.po

l10n/ca/files_external.po

l10n/ca/settings.po

l10n/cs_CZ/core.po

l10n/cs_CZ/files_external.po