Add CashAddr Address Format

Ported from Bitcoin Unlimited, Bitcoin ABC

src/qt/sendcoinsentry.cpp

@@ -7,6 +7,7 @@
 
 #include "addressbookpage.h"
 #include "addresstablemodel.h"
+#include "config.h"
 #include "guiutil.h"
 #include "optionsmodel.h"
 #include "platformstyle.h"
@@ -29,6 +30,11 @@ SendCoinsEntry::SendCoinsEntry(const PlatformStyle *platformStyle, QWidget *pare
     ui->deleteButton_is->setIcon(platformStyle->SingleColorIcon(":/icons/remove"));
     ui->deleteButton_s->setIcon(platformStyle->SingleColorIcon(":/icons/remove"));
 
+    ui->messageTextLabel->setToolTip(tr("A message that was attached to the %1 URI which will be"
+                                        " stored with the transaction for your reference. Note: "
+                                        "This message will not be sent over the Bitcoin network.")
+                                         .arg(GUIUtil::bitcoinURIScheme(GetConfig())));
+
     setCurrentWidget(ui->SendCoins);
 
     if (platformStyle->getUseExtraSpacing())