Rpc.undo and Rpc.redo #457
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What I did
Add
rpc.undoandrpc.redomethods. Closes #454How I did it
Rpc._add_to_undo_bufferkeeps a record of each transaction, and takes a new snapshot each time a transaction is performed.Rpc.undoandRpc.redomove through the undo buffer.How to verify it
Run tests.