Fixes KIDS category and better support for Kids profiles

The `KIDS` category item didn't really work as a category item since the Netflix calls and results depends on whether the _selected profile_ is a `Kids` profile or not. It would load an empty list if you were logged in with a normal profile, or the correct list if you were logged in with a `Kids` profile, but was still there in both cases.

This PR removes the KIDS category list item and gives better support for KIDS profiles, keeping the `Genres` category item in both Kids and non-kids profiles, but changing the call depending on the if the selected profile is a `Kids` one or not.

I was only able to test this on a Netflix account with multiple profiles, so I'm not sure how it'd work with only one profile; it'd be good if someone could test that if they have the ability...