Removed about dialog grid spacing.

Before:

![screen shot 2013-10-10 at 8 07 17 pm](https://f.cloud.github.com/assets/1495261/1311960/63550ac2-3222-11e3-81c4-fcd79f288678.png)

After:

![screen shot 2013-10-10 at 8 07 52 pm](https://f.cloud.github.com/assets/1495261/1311961/687bfeca-3222-11e3-9b52-a6efb78d5763.png)