[tx-robot] updated from transifex

apps/accessibility/l10n/nl.js

apps/accessibility/l10n/nl.json

apps/accessibility/l10n/ru.js

apps/accessibility/l10n/ru.json

apps/accessibility/l10n/sk.js

apps/accessibility/l10n/sk.json

apps/accessibility/l10n/uk.js

apps/accessibility/l10n/uk.json

apps/dav/l10n/is.js

apps/dav/l10n/is.json

apps/files_sharing/l10n/is.js

apps/files_sharing/l10n/is.json

apps/settings/l10n/lt_LT.js

apps/settings/l10n/lt_LT.json