Persist undo past "download latest"

99.9% of the time, I love having the warnings for up/download set to "always" not prompt. Then 1 time in 1000, I bump "download" instead of "upload", frantically hit "cancel", and am always too late (at 'best', I end up with a partial download), and say goodbye permanently to whatever I had done.

If the entire contents of the file could be put into the undo history as the 'previous step' to downloading, then in this situation I could just hit undo and all would be good. This would be incredibly useful in those terrible accidental touch situations.

(It would be nice if the entire undo history was also preserved, but just getting the previous version of the complete file would be enough).