Fix tonal styling across templates

This corrects some regressions with tonal styling:

- [new] remove obituaries and analysis from the comment tone mapping (request from editorial)
- [fix] Use correct tone on secondary navigation at mobile breakpoints
- [fix] Use correct tone on most popular component in footer at mobile breakpoints

![Touch the rainbow](http://media3.giphy.com/media/IV420aEx7aE1y/giphy.gif)

### Before
![screenshot from 2014-03-18 14 55 27](https://f.cloud.github.com/assets/80089/2449055/6f8e4364-aead-11e3-8e18-ca95000ca4b1.png)

### After
![screenshot from 2014-03-18 14 55 38](https://f.cloud.github.com/assets/80089/2449057/72d1d59a-aead-11e3-9f99-cc69cd768d8d.png)