Set the field lists with to auto.

Adjust the max width of field lists, currently they will span the whole page and it can make the document really hard to read .. I think it's spreading the information too thinly so i have a patch that changes only field list tables back to auto for width.

## Before

![before](http://i42.tinypic.com/1xnjo.jpg)

## After

![after](http://i39.tinypic.com/33fb14k.png)