Add support to new choosers for the preference to apply a single choice and close automatically
Issue#: CODE-2210

git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@20888 ef53c05b-3124-4d59-ae7d-fe3273f42be7

https://github.com/pcgen/pcgen/commit/ac4422f