kivy ln invoice: handle missing 'd' tag
kivy ln invoice: handle missing 'd' tag

fixes https://github.com/spesmilo/electrum/issues/6262

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