Make use of overflow-x: scroll in release page

[hiroppy]

Hello :)

before

## after

---

I deleted this line(layouts/css/base.styl#L158) and then global pre has overflow-x: scroll.
I feel that I don't have any problem even if pre has the overflow-x: scroll at global.

in about page(IE11)

check browsers

• chrome
• chromium
• firefox
• safari
• IE11

Cheers!

[ghost]

Travis build passed 👍

[lpinca]

@abouthiroppy does scroll works on iOS? Asking because of this nodejs/node#5878.

[hiroppy]

@lpinca Thanks, I checked below:)

Simulator

• iOS 8.2
• iOS 9.2

actual machine

• iOS 9.2

All device is iPhone6.

[lpinca]

Tested it myself and can confirm that it works. LGTM.

[fhemberger]

Great, thank you! Merged.