kivy: improve layout of settings dialog
kivy: improve layout of settings dialog

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