qt: Improve URI/file handling message

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

src/qt/paymentserver.cpp

@@ -235,9 +235,9 @@ void PaymentServer::handleURIOrFile(const QString& s)
                 if (!IsValidDestinationString(recipient.address.toStdString())) {
                     if (uri.hasQueryItem("r")) {  // payment request
                         Q_EMIT message(tr("URI handling"),
-                            tr("Cannot process payment request because BIP70 is not supported.")+
-                            tr("Due to widespread security flaws in BIP70 it's strongly recommended that any merchant instructions to switch wallets be ignored.")+
-                            tr("If you are receiving this error you should request the merchant provide a BIP21 compatible URI."),
+                            tr("Cannot process payment request because BIP70 is not supported.\n"
+                               "Due to widespread security flaws in BIP70 it's strongly recommended that any merchant instructions to switch wallets be ignored.\n"
+                               "If you are receiving this error you should request the merchant provide a BIP21 compatible URI."),
                             CClientUIInterface::ICON_WARNING);
                     }
                     Q_EMIT message(tr("URI handling"), tr("Invalid payment address %1").arg(recipient.address),
@@ -258,9 +258,9 @@ void PaymentServer::handleURIOrFile(const QString& s)
     if (QFile::exists(s)) // payment request file
     {
         Q_EMIT message(tr("Payment request file handling"),
-            tr("Cannot process payment request because BIP70 is not supported.")+
-            tr("Due to widespread security flaws in BIP70 it's strongly recommended that any merchant instructions to switch wallets be ignored.")+
-            tr("If you are receiving this error you should request the merchant provide a BIP21 compatible URI."),
+            tr("Cannot process payment request because BIP70 is not supported.\n"
+               "Due to widespread security flaws in BIP70 it's strongly recommended that any merchant instructions to switch wallets be ignored.\n"
+               "If you are receiving this error you should request the merchant provide a BIP21 compatible URI."),
             CClientUIInterface::ICON_WARNING);
     }
 }