Add 'non-Binary' to User Gender
Currently Kentico uses an Integer to store the User Gender with the values 0 / 1 / 2 (Unknown / Male / Female / Other). Given the way things have changed can this be updated to 0 / 1 / 2 / 3 (Unknown / Male / Female / Non-Binary)
Perhaps you can also add a UserGenderName field, so that non-binary options can be stored as text within that field. For out-of-the-box this can be left null and developers would need to implement based on their requirements.
As an example Facebook allows at least 56 different string entries for Gender in addition to Male & Female. Facebook also have a Gender Pronoun field, which would be nice to have in the base classes, but I do feel this would be much more site-specific and could be easily implemented by developers adding the field themselves.
I've put this under platform since it affects several areas of Kentico including both User and Contact Management .