kivy tx dialog: don't show "remove tx" option so eagerly
kivy tx dialog: don't show "remove tx" option so eagerly

(long standing annoyance, not related to prev commit directly)

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