update 4.27 branch to newest changes in 4.26

also check whether HitActor is not nullptr on Tick (apparently Actor can be nullptr even if isSet is true) adding to the fix in commit 9de243b2

Source/RWTHVRToolkit/Private/Pawn/BasicVRInteractionComponent.cpp

@@ -138,7 +138,7 @@ void UBasicVRInteractionComponent::TickComponent(float DeltaTime, ELevelTick Tic
 	const FTwoVectors StartEnd = GetHandRay(MaxClickDistance);
 	TOptional<FHitResult> Hit = RaytraceForFirstHit(StartEnd);
 
-	if (!Hit.IsSet())
+	if (!Hit.IsSet() || !Hit->GetActor())
 	{
 		if(InteractionRayVisibility==EInteractionRayVisibility::VisibleOnHoverOnly)
 		{