Qt: ignore double clicks unless they are left clicks

rpcs3/rpcs3qt/save_data_list_dialog.cpp

@@ -8,6 +8,7 @@
 #include <QHeaderView>
 #include <QGuiApplication>
 #include <QScreen>
+#include <QMouseEvent>
 
 constexpr auto qstr = QString::fromStdString;
 
@@ -229,3 +230,18 @@ void save_data_list_dialog::UpdateList()
 
 	resize(preferred_size.boundedTo(max_size));
 }
+
+void save_data_list_dialog::mouseDoubleClickEvent(QMouseEvent* ev)
+{
+	if (!ev) return;
+
+	// Qt's itemDoubleClicked signal doesn't distinguish between mouse buttons and there is no simple way to get the pressed button.
+	// So we have to ignore this event when another button is pressed.
+	if (ev->button() != Qt::LeftButton)
+	{
+		ev->ignore();
+		return;
+	}
+
+	QDialog::mouseDoubleClickEvent(ev);
+}