Fix #7905: Dotfiles should be colored in white

Dotfiles are now colored in white instead of grey. See attached screenshots for details.

## Before
![before](https://cloud.githubusercontent.com/assets/141435/3152421/1fb2b394-ea8e-11e3-9d9e-d2318d011915.png)

## After
![after](https://cloud.githubusercontent.com/assets/141435/3152420/1f9c0414-ea8e-11e3-898d-cd17acb7f4e3.png)

for #7905