Better positioning for load/save dialog

Real PSP
![3](https://f.cloud.github.com/assets/3000282/532348/7b9d0d46-c143-11e2-9645-2c45e826ff2e.jpg)

Before
![1](https://f.cloud.github.com/assets/3000282/532346/34ab3ab6-c143-11e2-8f82-fa3839e5af92.jpg)

After
![2](https://f.cloud.github.com/assets/3000282/532347/36c4759c-c143-11e2-87be-5ba811adfa7f.jpg)