Added commissions system

Source/NakedDesire/Stats/StatsManager.cpp

@@ -88,10 +88,33 @@ void UStatsManager::SetObserved(const bool bObserved, AActor* Observer)
 	if (!Observer)
 		return;
 
+	bool bChanged = false;
 	if (bObserved)
-		Observers.AddUnique(Observer);
+	{
+		if (!Observers.Contains(Observer))
+		{
+			Observers.Add(Observer);
+			bChanged = true;
+		}
+	}
 	else
-		Observers.Remove(Observer);
+	{
+		bChanged = Observers.Remove(Observer) > 0;
+	}
+
+	if (bChanged)
+		OnObserversChanged.Broadcast();
+}
+
+int32 UStatsManager::GetObserverCount() const
+{
+	int32 Count = 0;
+	for (const TWeakObjectPtr<AActor>& Observer : Observers)
+	{
+		if (Observer.IsValid())
+			++Count;
+	}
+	return Count;
 }
 
 void UStatsManager::IncreaseEmbarrassment(const float Amount)