Period switcher dropdown too thin for top topics list in mobile view

[meglio (Anton)]

This dropdown box needs some improvement:

It is a period switcher control found found on the “top” topics list.

We should make it take full screen width.

[codinghorror (Jeff Atwood)]

I agree, this is a problem on English locale too. Can you have a look @neil?

[neil (Neil Lalonde)]

I pushed a fix for it.