Moved hygiene out of init hook into separate admin_init hook.

git-svn-id: https://plugins.svn.wordpress.org/wpgform/trunk@900078 b8457f37-d9ea-0310-8a92-e5e31aec5664
Prep for v0.66.

git-svn-id: https://plugins.svn.wordpress.org/wpgform/trunk@900079 b8457f37-d9ea-0310-8a92-e5e31aec5664