problem fixed when delete permanent.

git-svn-id: https://plugins.svn.wordpress.org/delete-duplicate-data/trunk@867941 b8457f37-d9ea-0310-8a92-e5e31aec5664
new user interface

git-svn-id: https://plugins.svn.wordpress.org/delete-duplicate-data/trunk@867980 b8457f37-d9ea-0310-8a92-e5e31aec5664
screenshot updated

git-svn-id: https://plugins.svn.wordpress.org/delete-duplicate-data/trunk@868056 b8457f37-d9ea-0310-8a92-e5e31aec5664
update class

git-svn-id: https://plugins.svn.wordpress.org/delete-duplicate-data/trunk@869261 b8457f37-d9ea-0310-8a92-e5e31aec5664