qt, refactor: Fix 'buttonClicked is deprecated' warnings
qt, refactor: Fix 'buttonClicked is deprecated' warnings

fujicoin/fujicoin,namecoin/namecore,tecnovert/particl-core,domob1812/namecore,pataquets/namecoin-core,dscotese/bitcoin,qtumproject/qtum,sstone/bitcoin,bitcoinknots/bitcoin,kallewoof/bitcoin,Xekyo/bitcoin,domob1812/bitcoin,sstone/bitcoin,apoelstra/bitcoin,jambolo/bitcoin,domob1812/bitcoin,mm-s/bitcoin,achow101/bitcoin,mruddy/bitcoin,jambolo/bitcoin,pstratem/bitcoin,domob1812/namecore,MarcoFalke/bitcoin,andreaskern/bitcoin,jlopp/statoshi,namecoin/namecore,domob1812/bitcoin,pstratem/bitcoin,pstratem/bitcoin,Sjors/bitcoin,jamesob/bitcoin,JeremyRubin/bitcoin,AkioNak/bitcoin,yenliangl/bitcoin,fujicoin/fujicoin,EthanHeilman/bitcoin,fujicoin/fujicoin,particl/particl-core,andreaskern/bitcoin,Sjors/bitcoin,ElementsProject/elements,JeremyRubin/bitcoin,sstone/bitcoin,fanquake/bitcoin,namecoin/namecore,ElementsProject/elements,n1bor/bitcoin,lateminer/bitcoin,prusnak/bitcoin,mm-s/bitcoin,achow101/bitcoin,dscotese/bitcoin,yenliangl/bitcoin,sipsorcery/bitcoin,instagibbs/bitcoin,practicalswift/bitcoin,sstone/bitcoin,jambolo/bitcoin,sstone/bitcoin,namecoin/namecore,fanquake/bitcoin,jlopp/statoshi,mruddy/bitcoin,bitcoinknots/bitcoin,lateminer/bitcoin,cdecker/bitcoin,sipsorcery/bitcoin,domob1812/bitcoin,ElementsProject/elements,namecoin/namecoin-core,MarcoFalke/bitcoin,jlopp/statoshi,jnewbery/bitcoin,jnewbery/bitcoin,yenliangl/bitcoin,prusnak/bitcoin,qtumproject/qtum,jamesob/bitcoin,dscotese/bitcoin,ElementsProject/elements,GroestlCoin/GroestlCoin,pataquets/namecoin-core,sstone/bitcoin,GroestlCoin/GroestlCoin,JeremyRubin/bitcoin,pstratem/bitcoin,jlopp/statoshi,domob1812/bitcoin,particl/particl-core,fanquake/bitcoin,bitcoinsSG/bitcoin,prusnak/bitcoin,namecoin/namecoin-core,tecnovert/particl-core,n1bor/bitcoin,prusnak/bitcoin,namecoin/namecoin-core,prusnak/bitcoin,kallewoof/bitcoin,MeshCollider/bitcoin,jambolo/bitcoin,jlopp/statoshi,GroestlCoin/GroestlCoin,GroestlCoin/GroestlCoin,jnewbery/bitcoin,bitcoin/bitcoin,particl/particl-core,particl/particl-core,anditto/bitcoin,anditto/bitcoin,fujicoin/fujicoin,pstratem/bitcoin,bitcoinsSG/bitcoin,AkioNak/bitcoin,EthanHeilman/bitcoin,fanquake/bitcoin,MarcoFalke/bitcoin,JeremyRubin/bitcoin,anditto/bitcoin,cdecker/bitcoin,fanquake/bitcoin,namecoin/namecoin-core,MeshCollider/bitcoin,MeshCollider/bitcoin,mm-s/bitcoin,andreaskern/bitcoin,sipsorcery/bitcoin,MarcoFalke/bitcoin,bitcoinknots/bitcoin,jamesob/bitcoin,andreaskern/bitcoin,Xekyo/bitcoin,jnewbery/bitcoin,domob1812/namecore,achow101/bitcoin,practicalswift/bitcoin,EthanHeilman/bitcoin,achow101/bitcoin,bitcoinsSG/bitcoin,ajtowns/bitcoin,bitcoin/bitcoin,rnicoll/bitcoin,bitcoinknots/bitcoin,Xekyo/bitcoin,apoelstra/bitcoin,lateminer/bitcoin,rnicoll/bitcoin,particl/particl-core,sipsorcery/bitcoin,n1bor/bitcoin,mruddy/bitcoin,domob1812/namecore,pataquets/namecoin-core,n1bor/bitcoin,Xekyo/bitcoin,qtumproject/qtum,ajtowns/bitcoin,ElementsProject/elements,namecoin/namecore,mruddy/bitcoin,jamesob/bitcoin,lateminer/bitcoin,cdecker/bitcoin,GroestlCoin/GroestlCoin,ajtowns/bitcoin,qtumproject/qtum,fujicoin/fujicoin,AkioNak/bitcoin,sipsorcery/bitcoin,fanquake/bitcoin,ajtowns/bitcoin,andreaskern/bitcoin,tecnovert/particl-core,yenliangl/bitcoin,rnicoll/bitcoin,GroestlCoin/bitcoin,instagibbs/bitcoin,namecoin/namecoin-core,Xekyo/bitcoin,anditto/bitcoin,pstratem/bitcoin,AkioNak/bitcoin,AkioNak/bitcoin,GroestlCoin/bitcoin,cdecker/bitcoin,GroestlCoin/bitcoin,pataquets/namecoin-core,kallewoof/bitcoin,apoelstra/bitcoin,mm-s/bitcoin,GroestlCoin/GroestlCoin,JeremyRubin/bitcoin,dscotese/bitcoin,tecnovert/particl-core,jambolo/bitcoin,anditto/bitcoin,kallewoof/bitcoin,dscotese/bitcoin,andreaskern/bitcoin,kallewoof/bitcoin,EthanHeilman/bitcoin,apoelstra/bitcoin,jambolo/bitcoin,cdecker/bitcoin,jamesob/bitcoin,achow101/bitcoin,instagibbs/bitcoin,ElementsProject/elements,bitcoinsSG/bitcoin,tecnovert/particl-core,practicalswift/bitcoin,rnicoll/bitcoin,fujicoin/fujicoin,instagibbs/bitcoin,pataquets/namecoin-core,pataquets/namecoin-core,mruddy/bitcoin,qtumproject/qtum,apoelstra/bitcoin,EthanHeilman/bitcoin,bitcoinknots/bitcoin,domob1812/namecore,instagibbs/bitcoin,n1bor/bitcoin,GroestlCoin/bitcoin,particl/particl-core,lateminer/bitcoin,qtumproject/qtum,practicalswift/bitcoin,rnicoll/bitcoin,Xekyo/bitcoin,bitcoinsSG/bitcoin,MarcoFalke/bitcoin,JeremyRubin/bitcoin,yenliangl/bitcoin,MarcoFalke/bitcoin,dscotese/bitcoin,jnewbery/bitcoin,MeshCollider/bitcoin,lateminer/bitcoin,domob1812/namecore,ajtowns/bitcoin,mm-s/bitcoin,GroestlCoin/bitcoin,ajtowns/bitcoin,Sjors/bitcoin,jamesob/bitcoin,namecoin/namecoin-core,domob1812/bitcoin,GroestlCoin/bitcoin,namecoin/namecore,tecnovert/particl-core,bitcoin/bitcoin,qtumproject/qtum,bitcoinsSG/bitcoin,apoelstra/bitcoin,prusnak/bitcoin,bitcoin/bitcoin,MeshCollider/bitcoin,rnicoll/bitcoin,practicalswift/bitcoin,anditto/bitcoin,practicalswift/bitcoin,kallewoof/bitcoin,yenliangl/bitcoin,mruddy/bitcoin,bitcoin/bitcoin,achow101/bitcoin,jlopp/statoshi,instagibbs/bitcoin,cdecker/bitcoin,EthanHeilman/bitcoin,bitcoin/bitcoin,mm-s/bitcoin,MeshCollider/bitcoin,n1bor/bitcoin,Sjors/bitcoin,Sjors/bitcoin,AkioNak/bitcoin,sipsorcery/bitcoin