fix kivy -- virtual keyboard for seed input: chars were not getting enabled
fix kivy -- virtual keyboard for seed input: chars were not getting enabled

kivy master broke this in kivy/kivy#5537

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