Qt: use idClicked(); buttonClicked(int) is gone in Qt 6

Closes #1670

win/Qt/qt_plsel.cpp

@@ -358,8 +358,13 @@ NetHackQtPlayerSelector::NetHackQtPlayerSelector(
 	genderbox->layout()->addWidget(gender[i]);
 	gendergroup->addButton(gender[i], i);
     }
+#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
+    connect(gendergroup, SIGNAL(idClicked(int)),
+            this, SLOT(selectGender(int)));
+#else
     connect(gendergroup, SIGNAL(buttonClicked(int)),
             this, SLOT(selectGender(int)));
+#endif
 
     QLabel *alignlabel = new QLabel("Alignment");
     alignbox->layout()->addWidget(alignlabel);
@@ -369,8 +374,13 @@ NetHackQtPlayerSelector::NetHackQtPlayerSelector(
 	alignbox->layout()->addWidget(alignment[i]);
 	aligngroup->addButton(alignment[i], i);
     }
+#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
+    connect(aligngroup, SIGNAL(idClicked(int)),
+            this, SLOT(selectAlignment(int)));
+#else
     connect(aligngroup, SIGNAL(buttonClicked(int)),
             this, SLOT(selectAlignment(int)));
+#endif
 
     l->addWidget(rand_btn, 4, 2);
     connect(rand_btn, SIGNAL(clicked()), this, SLOT(Randomize()));

win/Qt/qt_yndlg.cpp

@@ -292,7 +292,13 @@ char NetHackQtYnDialog::Exec()
 	    bgroup->addButton(button, i);
 	}
 
-        connect(bgroup, SIGNAL(buttonClicked(int)), this, SLOT(doneItem(int)));
+#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
+        connect(bgroup, SIGNAL(idClicked(int)), this,
+                SLOT(doneItem(int)));
+#else
+        connect(bgroup, SIGNAL(buttonClicked(int)), this,
+                SLOT(doneItem(int)));
+#endif
 
         QLabel *lb = 0;
         if (allow_count) {