When I open Dashboard-->Plugins, the page lists all of my installed plugins in an admin table. It displays two columns: 'Plugin' and 'Description' (screenshot). How can I add a new column to this table, and display data of my choosing? I am aware of WP_List_Table(), and have used it in the past to create a new admin table, on a new admin page. But can I use it to modify the existing plugins table?
Alternatively, if I could add additional information to the existing 'Description' column--as other plugins do (screenshot--that would be acceptable.