I just deleted a cell I needed and don't think I can get it back!
(I'm sorry that you lost a cell!)
Since universal Ctrl+Z is still a long way off, we could add a bubble in the corner of your screen when you delete a cell:
Cell deleted! UNDO
like in gmail
@Pocket-titan suggested that deleting should require a second confirmation click

the undo delete cell button disappeared before I could click it!
another lost cell :cry:
how can I undo once the button disappears?
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