More minor fixes:
- Fixes a rare crash that could occur after seeing the ending cutscene.
- In order for a grove to be marked as cleared, you now must reveal the monument in that grove if there is a monument. You may still exit groves with undiscovered monuments. The main consequence of this change is that upon reaching the exit of a grove win an undiscovered monument, the grove's position will not be saved and on restart, you will have the chance to play again from the start.