swaps dialog: handle make_unsigned_tx exceptions. fixes #6246
swaps dialog: handle make_unsigned_tx exceptions. fixes #6246

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