wallet: synchronize_sequence cleaned up a bit
wallet: synchronize_sequence cleaned up a bit

wakiyamap/electrum-mona,spesmilo/electrum,spesmilo/electrum,wakiyamap/electrum-mona,pooler/electrum-ltc,fujicoin/electrum-fjc,vialectrum/vialectrum,vialectrum/vialectrum,neocogent/electrum,spesmilo/electrum,vialectrum/vialectrum,wakiyamap/electrum-mona,neocogent/electrum,pooler/electrum-ltc,wakiyamap/electrum-mona,fujicoin/electrum-fjc,cryptapus/electrum,neocogent/electrum,cryptapus/electrum,cryptapus/electrum,pooler/electrum-ltc,pooler/electrum-ltc,fujicoin/electrum-fjc,spesmilo/electrum