Make/Break Struct node breaks for native structs after modifying the structure in a hot reload

Changing and compiling a custom struct in C++ will break behavior of Make/Break Struct nodes in blueprints if the blueprint is saved after the compile.

Regression:
No - blueprint fails to save after detailed code change in 4.14.3

Workaround:
If the node is already placed in the blueprint, saving the blueprint before compiling code and/or declining to save changes to the blueprint will show the updated node (TestVar3) on project restart.

1. Open UE4 Editor (any project)
2. Add code class based on actor (MyActor)
3. Add the following code to MyActor.h above UCLASS() macro

   USTRUCT(BlueprintType)
   struct FTestStruct
   {
   GENERATED_USTRUCT_BODY()
   UPROPERTY(EditAnywhere, BlueprintReadOnly)
   int32 TestVar;
   
   UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "Points")
   int32 TestVar2;
   };
   

4. Compile
5. Create blueprint based on actor (ActorBP)
6. Add Break TestStruct node
7. In code, add the following to FTestStruct

   UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "Points")
   int32 TestVar3;
   

8. Compile
9. Save the blueprint
10. Close and restart the project
11. Reopen ActorBP

Result:
Break TestStruct node now reads "Break <unknown struct>" and all variables are missing

Expected:
TestVar 3 pin is added to Break Struct node after hot reload / project restart