Undo/Undelete throughout LS
Enhancement Request #6962 – Undo/Reset Button in Schedule Tab and Enhancement Request #5022 – Add an “Undo” button for grades pages
Stephen Tuttle commented
I could really use an undo button in gradebook. Currently, if I accidentally type a score over an existing score I don't have anyway of retrieving the original.
Kevin Seppi commented
Many online tools keep a revision history (wikipedia for example). This allows one to keep track of changes and even back them out conveniently.