Also in 4.11 i have found that if you define protected ptoperty with
UPROPERTY(EditDefaultsOnly, Category = “WeaponSets”)
As you can see category name consists of 2 words started with letters in upper case.
In child class definition with:
hideCategories = (“WeaponSets”)
or
hideCategories = (WeaponSets)
will not hides this category from class detail pannel