Fixed a small bug of an unused second parameter of `filter_add_new_columns`

git-svn-id: https://plugins.svn.wordpress.org/bb-edition-control/trunk@822604 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add class `alternate` on list editions in admin page

git-svn-id: https://plugins.svn.wordpress.org/bb-edition-control/trunk@822605 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed the method `BbEditionControlAdmin::url()` that points to plugin admin page

git-svn-id: https://plugins.svn.wordpress.org/bb-edition-control/trunk@823468 b8457f37-d9ea-0310-8a92-e5e31aec5664
novo screenshot-4.png

git-svn-id: https://plugins.svn.wordpress.org/bb-edition-control/trunk@823475 b8457f37-d9ea-0310-8a92-e5e31aec5664