Include sublink-kicker when altering colour of slashes after kickers

The new-ish `.fc-sublink__kicker` class was being omitted from styling in the tone files. This adds it.

Before:
![screen shot 2014-11-03 at 16 33 47](https://cloud.githubusercontent.com/assets/1607666/4885833/71d50110-6377-11e4-86b4-1edc92428912.png)

After:
![screen shot 2014-11-03 at 16 33 23](https://cloud.githubusercontent.com/assets/1607666/4885832/71cf6dc2-6377-11e4-8acc-652c02ef50e9.png)