message: Dismiss notification with right mouse button
diff: @@ -87,7 +87,11 @@ void NotificationArea::push(const std::string& brief, const std::string& message
  void NotificationArea::onMouseDown(EventHandler::MouseButton button, int x, int y)
  {
  - if (button != EventHandler::MouseButton::Left) { return; }
  + if (button != EventHandler::MouseButton::Left &&
  + button != EventHandler::MouseButton::Right)
  + {
  + return;
  + }
  const NAS2D::Point clickPoint{ x, y };
  @@ -95,8 +99,12 @@ void NotificationArea::onMouseDown(EventHandler::MouseButton button, int x, int
  for (auto& rect : mNotificationRectList)
  {
  if (rect.contains(clickPoint))
  + {
  + if (button == EventHandler::MouseButton::Left)
  {
  mNotificationClicked(mNotificationList.at(count));
  + }
  +
  mNotificationList.erase(mNotificationList.begin() + count);
  mNotificationRectList.erase(mNotificationRectList.begin() + count);
  updateRectListPositions();
  