Not necessary to connect to QDialogButton signal

It's already done in KMessageBox::createKMessageBox

src/filter/mdnadvicedialog.cpp

@@ -107,8 +107,6 @@ MDNAdviceDialog::MDNAdviceDialog(const QString &text, bool canDeny, QWidget *par
     user1Button = new QPushButton;
     buttonBox->addButton(user1Button, QDialogButtonBox::ActionRole);
     connect(user1Button, &QPushButton::clicked, this, &MDNAdviceDialog::slotUser1Clicked);
-    connect(buttonBox, &QDialogButtonBox::accepted, this, &MDNAdviceDialog::accept);
-    connect(buttonBox, &QDialogButtonBox::rejected, this, &MDNAdviceDialog::reject);
     if (canDeny) {
         QPushButton *user2Button = new QPushButton;
         connect(user2Button, &QPushButton::clicked, this, &MDNAdviceDialog::slotUser2Clicked);

src/filter/tests/mndadvicedialoggui.cpp

@@ -18,13 +18,27 @@
 #include "filter/mdnadvicedialog.h"
 
 #include <QApplication>
-
+#include <QDebug>
 int main(int argc, char **argv)
 {
     QApplication app(argc, argv);
 
-    MailCommon::MDNAdviceDialog *w = new MailCommon::MDNAdviceDialog(QStringLiteral("test mnda"), false);
-    w->exec();
+    MailCommon::MDNAdviceDialog *w = new MailCommon::MDNAdviceDialog(QStringLiteral("test mnda"), true);
+    MessageComposer::MDNAdvice rc = MessageComposer::MDNIgnore;
+    if (w->exec()) {
+        rc = w->result();
+    }
+    switch (rc) {
+    case MessageComposer::MDNSend:
+        qDebug() << "MessageComposer::MDNSend ";
+        break;
+    case MessageComposer::MDNSendDenied:
+        qDebug() << "MessageComposer::MDNSendDenied ";
+        break;
+    case MessageComposer::MDNIgnore:
+        qDebug() << "MessageComposer::MDNIgnore ";
+        break;
+    }
     app.exec();
     delete w;
     return 0;