Make "save to PCG" related to the place where a Bonus is placed rather than an inherent part of the Bonus Object
(separates usage from the object itself - CODE-117)

Issue#: CODE-117, CODE-2502


git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@23206 ef53c05b-3124-4d59-ae7d-fe3273f42be7