Add OU as a select box when editing a host.  Will work for adding as well shortely.
Had to tweak javascript for this method to work, this is just commented out so if we need it later on we can recover.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@1856 71f96598-fa45-0410-b640-bcd6f8691b32