Do not show the default enumeration value if it is not in the list

[zhenyazb]

1. Create dynamic attribute with Enumeration value type.
2. Set a few enumeration values.
3. Set defaul value that is not equal to any value from the list.
   
4. Set visibility for the attribute in the entity editor screen.
5. Open editor screen for the entity.

Actual result: default value is displayed for the dynamic attribute

It will be better not to display default value if it is not in the list of enumerations.