Add a notification bar for redirected pages, and more…

Hello,

Thank you for creating this great plugin. As a user for several years I wondered if you would consider these enhancements:

1. On the WP page-list table, add a column ‘Redirection’ notifying the user that the page has a redirect (Title, Author, Date, Redirection)
2. On the edit page itself add a redirect meta box – this will allow the admin to add/edit a current redirect from the page’s admin
3. add a top bar / notification that the page has an active redirect configured.

Thanks!

Dan