storage: better error msg on unsupported seed version
storage: better error msg on unsupported seed version

pooler/electrum-ltc,pooler/electrum-ltc,wakiyamap/electrum-mona,spesmilo/electrum,spesmilo/electrum,vialectrum/vialectrum,pooler/electrum-ltc,wakiyamap/electrum-mona,spesmilo/electrum,wakiyamap/electrum-mona,pooler/electrum-ltc,wakiyamap/electrum-mona,vialectrum/vialectrum,vialectrum/vialectrum,spesmilo/electrum