[tx-robot] updated from transifex

apps/files/l10n/cs_CZ.php

apps/files/l10n/de.php

apps/files/l10n/el.php

apps/files/l10n/it.php

apps/files/l10n/sk_SK.php

apps/files/l10n/sl.php

apps/files_versions/l10n/fi_FI.php

l10n/cs_CZ/files.po

l10n/de/files.po

l10n/el/files.po

l10n/fi_FI/files_versions.po

l10n/fi_FI/lib.po

l10n/it/files.po

l10n/sk_SK/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