Implement missing can_sign_xpubkey
Implement missing can_sign_xpubkey

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