Hide forms on trashed pages

git-svn-id: https://plugins.svn.wordpress.org/jumplead/trunk@990907 b8457f37-d9ea-0310-8a92-e5e31aec5664
Show no form message when there are active plugins but not forms inside them.

git-svn-id: https://plugins.svn.wordpress.org/jumplead/trunk@990914 b8457f37-d9ea-0310-8a92-e5e31aec5664