Cleanup goban.tex. My main goal was to get the button table code into a readable...

Cleanup goban.tex. My main goal was to get the button table code into a readable state - following the structure I suggested on ManualGuidelinesTalk. Put closing } on their own lines if they are around other (nested) opts or nopts, indented the same as the opening (n)opt. Also replacing the 'emph' used for the submenus with 'item' as well for consistency which also makes it possible to get rid of the forced linebreak.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25467 a1c6a512-1295-4272-9138-f99709370657