labels: fix potential threading issues
labels: fix potential threading issues

also handle --offline

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