SchemeLicense does not save child tile edits.

[chrabyrd]

To reproduce:

1. create a scheme license
2. attempt to edit child tile data (eg anything under right_type
3. save
4. notice no reported errors
5. notice the data is not updated.

[jacobtylerwalls]

Ah, when I implemented nested tile writes for Namjun, I only implemented it in the resource serializer. We probably want it in the tile serializer too. I could DRY this out a little bit to fix this 👍