Allow items to be reordered in equipment sets 
* Fix ordering of equip sets for old characters on load.
* Fix problems with id path reordering on insert.
* Add move up/move down context menu functions.
Issue#: CODE-1687


git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk/pcgen@20105 ef53c05b-3124-4d59-ae7d-fe3273f42be7