qt: Improve URI/file handling message
qt: Improve URI/file handling message

This change:
- fixes missing spaces after full stops
- makes translation context bigger

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