start new game after progress delete maintains the saved map offsets

Reproduce bug:

1. Start new game
2. Save progress after leaving first house
3. Refresh browser
4. Start new game and get prompt that old progress will be deleted
5. Start offset of first house is wrong (maintained last offset of saved progress)

Classes are initiated with the saved progress and are not re-initiated after progress is deleted on starting a new game:

Affected:

• Data Class