Fixed issue with adding fields to the form. In previous versions it was slower, options were forgotten or given to something else, when the fields were rearranged. Now even if you rearrange the fields, it can work out those past problems.

git-svn-id: https://plugins.svn.wordpress.org/a-forms/trunk@759732 b8457f37-d9ea-0310-8a92-e5e31aec5664