Add Undo button to Paste Multiple Times

[jidanni]

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When Appending there is the convenient undo button available at the bottom if we make a mistake,

Alas, for Paste Multiple Times, we would have to break out, undo, and restart, to undo just once.

[simonpoole]

The problem here is that this would be the "normal" undo functionality, so nothing to stop you from going back as far as you like, which wouldn't seem to make sense in the context of pasting.