kivy: minor fix (checkbox.active cannot be None)
kivy: minor fix (checkbox.active cannot be None)

spesmilo/electrum,aasiutin/electrum,cryptapus/electrum,argentumproject/electrum-arg,cryptapus/electrum-myr,dashpay/electrum-dash,kyuupichan/electrum,digitalbitbox/electrum,argentumproject/electrum-arg,argentumproject/electrum-arg,pooler/electrum-ltc,neocogent/electrum,molecular/electrum,dabura667/electrum,pknight007/electrum-vtc,vertcoin/electrum-vtc,fyookball/electrum,molecular/electrum,kyuupichan/electrum,pknight007/electrum-vtc,cryptapus/electrum-myr,aasiutin/electrum,fireduck64/electrum,dashpay/electrum-dash,vialectrum/vialectrum,aasiutin/electrum,dashpay/electrum-dash,wakiyamap/electrum-mona,dashpay/electrum-dash,fireduck64/electrum,molecular/electrum,wakiyamap/electrum-mona,asfin/electrum,wakiyamap/electrum-mona,vertcoin/electrum-vtc,cryptapus/electrum,aasiutin/electrum,asfin/electrum,pknight007/electrum-vtc,protonn/Electrum-Cash,fireduck64/electrum,fujicoin/electrum-fjc,romanz/electrum,fujicoin/electrum-fjc,dabura667/electrum,dabura667/electrum,spesmilo/electrum,pooler/electrum-ltc,argentumproject/electrum-arg,vertcoin/electrum-vtc,pknight007/electrum-vtc,kyuupichan/electrum,dabura667/electrum,cryptapus/electrum-myr,romanz/electrum,protonn/Electrum-Cash,cryptapus/electrum-myr,asfin/electrum,digitalbitbox/electrum,spesmilo/electrum,molecular/electrum,romanz/electrum,wakiyamap/electrum-mona,neocogent/electrum,vialectrum/vialectrum,digitalbitbox/electrum,cryptapus/electrum,fyookball/electrum,spesmilo/electrum,protonn/Electrum-Cash,neocogent/electrum,vialectrum/vialectrum,pooler/electrum-ltc,fujicoin/electrum-fjc,pooler/electrum-ltc,fireduck64/electrum,vertcoin/electrum-vtc,fyookball/electrum,digitalbitbox/electrum,protonn/Electrum-Cash