bugfix in "load button names"

git-svn-id: https://plugins.svn.wordpress.org/wp-pro-quiz/trunk@1007261 b8457f37-d9ea-0310-8a92-e5e31aec5664
Release 0.34

git-svn-id: https://plugins.svn.wordpress.org/wp-pro-quiz/trunk@1007262 b8457f37-d9ea-0310-8a92-e5e31aec5664