derived gameviewport from displaycluster one, so it works with ndisplay

Source/StudyFrameworkPlugin/Public/HUD/SFGlobalFadeGameViewportClient.h

@@ -3,18 +3,17 @@
 
 #pragma once
 
-#include "Engine/GameViewportClient.h"
+#include "DisplayClusterViewportClient.h"
 #include "SFGlobalFadeGameViewportClient.generated.h"
 
 /**
  * A simple UGameViewportClient used to handle a global fade in/out
- 
  * Always starts faded out
- 
+ * It had to be derived from UDisplayClusterViewportClient instead of UGameViewportClient so it works in nDisplay
  */
 
 UCLASS()
-class STUDYFRAMEWORKPLUGIN_API USFGlobalFadeGameViewportClient : public UGameViewportClient
+class STUDYFRAMEWORKPLUGIN_API USFGlobalFadeGameViewportClient : public UDisplayClusterViewportClient
 {
 	GENERATED_BODY()