Scroll through hair styles and facial hair

Adds < and > buttons to character setup screen to easily scroll to next
or previous hair style and facial hair, intead of opening the popup with
a long unsorted list.

Also adds two procs for returning the value of the previous or next
index in a list.

Preview (but the buttons have been moved to between the name and the color of the hair style)
![Preview gif](http://i.imgur.com/cTMzkpc.gif)