Add a standalone "Recheck" action to the "Broken Links" table. It does the same thing as the corresponding bulk action, but it checks the link immediately and displays the result without the user having to refresh the page.

git-svn-id: https://plugins.svn.wordpress.org/broken-link-checker/trunk@1027328 b8457f37-d9ea-0310-8a92-e5e31aec5664