ShowOnlyInnerProperties (Meta UPROPERTY tag) doesn't work in some cases

ShowOnlyInnerProperties doesn't work when the struct in question is either in an array or in an outer struct in an array. (There may be other broken cases as well.)

Example:

USTRUCT()
struct StructB
{
   GENERATED_USTRUCT_BODY()

   UPROPERTY(EditAnywhere, Category=MyCategory)
   int32 DataThatShouldInline;
}

USTRUCT()
struct StructA
{
   GENERATED_USTRUCT_BODY()

   UPROPERTY(EditAnywhere, Category=MyCategory)
   int32 X;
   
   UPROPERTY(EditAnywhere, Category=MyCategory, Meta=(ShowOnlyInnerProperties))
   StructB B;
};

and in a UCLASS somewhere:

UPROPERTY(EditAnywhere, Category=MyCategory)
TArray<StructA> TableOfStructAs;

UPROPERTY(EditAnywhere, Category=MyCategory)
TArray<StructB> TableOfStructBs;

In both cases, the table will still show a "StructB" that has to be expanded to see its contents, rather than correctly showing the members as directly part of StructA or as part of the array element (in the latter case).

It's possible that this problem exists for any struct-within-a-struct as well (even without an array), but I haven't investigated. It does work correctly when the struct is at the root level of the UCLASS, but possibly in no other cases.

n/a