EMI: Only use the wear chore for finding the screen bounding box.

This fixes the bounding boxes for the characters by only using the wear chore to find the screen bounding box.

Before:
![elainebb](https://cloud.githubusercontent.com/assets/459777/3758685/fa1b6098-184d-11e4-9550-b70192e84ac0.png)

After:
![bbfix](https://cloud.githubusercontent.com/assets/459777/3758687/ffb96374-184d-11e4-8152-c01e8539b039.png)