Small Fixes and Additions

Some small fixes and additions!

- Fixed edit faith color button

- Fixed Adopt Religion bug

- Fixed WASD movement when saving custom map

- Fixed age value not updating in the nation inspector when hitting the random nation button

- Increased Custom map max size from 800x800 to 1000x1000

- Fixed issues with custom map preview screenshots

- Added 4th bigger brush size

Still working on a solution for the castle/marker bug I've been seeing, and a few others. As always, let me know about any other bugs or issues you find :)