Undo section/cell deletion about livebook

[stentroad]

@mathiasose As a temporary workaround, you can update the shortcut in assets/js/session/index.js:

• } else if (keyBuffer.tryMatch(["d", "d"])) {

• } else if (keyBuffer.tryMatch(["d", "c"])) {
  Then run 'npm run deploy' in the assets folder. I finally did that after accidentally deleting one too many cells :-).

[m-dpositiv]

A recycle bin could be where deleted cells go. And a history interface would be nice. Google Sheets, photoshop, and dropbox all have version history or something similar that also provide a visual undo/redo/restore interface. The key being a restore or undo are new actions that just add to the history (you're not going back, you're overwriting current state with past state as new entry). A clear history could delete to save space or remove the log. Just some thoughts.

[mathiasose]

IMO this is pretty critical considering you added a keyboard shortcut to delete cells already, and it's vim-inspired. I have lost cells multiple times now because I want to delete a line and hit the vim binding for deleting a line because habit. That would be no big deal if I was able to undo. But as it is right now I can't undo, and I can't seem to disable the shortcut either?

[jonatanklosko]

Ah I can see how muscle memory tricks you into that, interesting point. Thanks for pinging this one, it's something we plan to implement sometime soon.