Bugfix: GUI: Restore SendConfirmationDialog button default to "Yes"

The SendConfirmationDialog is used for bumping the fee, where "Send" doesn't really make sense

Github-Pull: #bitcoin-core/gui#148
Rebased-From: 8775691383

src/qt/sendcoinsdialog.cpp

@@ -966,6 +966,9 @@ SendConfirmationDialog::SendConfirmationDialog(const QString& title, const QStri
     setStandardButtons(QMessageBox::Yes | QMessageBox::Cancel);
     setDefaultButton(QMessageBox::Cancel);
     yesButton = button(QMessageBox::Yes);
+    if (confirmButtonText.isEmpty()) {
+        confirmButtonText = yesButton->text();
+    }
     updateYesButton();
     connect(&countDownTimer, &QTimer::timeout, this, &SendConfirmationDialog::countDown);
 }

src/qt/sendcoinsdialog.h

@@ -115,7 +115,7 @@ class SendConfirmationDialog : public QMessageBox
     Q_OBJECT
 
 public:
-    SendConfirmationDialog(const QString& title, const QString& text, const QString& informative_text = "", const QString& detailed_text = "", int secDelay = SEND_CONFIRM_DELAY, const QString& confirmText = "Send", QWidget* parent = nullptr);
+    SendConfirmationDialog(const QString& title, const QString& text, const QString& informative_text = "", const QString& detailed_text = "", int secDelay = SEND_CONFIRM_DELAY, const QString& confirmText = "", QWidget* parent = nullptr);
     int exec() override;
 
 private Q_SLOTS: