Implement Undo/Redo ------------------- Key: DROOLS-3347 URL: https://issues.jboss.org/browse/DROOLS-3347 Project: Drools Issue Type: Enhancement Components: Scenario Simulation and Testing Reporter: Gabriele Cardosi Assignee: Gabriele Cardosi Priority: Major Provide actual implementation of undo/redo. Step: 1) verify that all model modification happen through commands (check "flush" methods inside grid cells and other access to model) 2) implement columns size persistence inside backend model (wrap simulation inside another object to store dimension size) 3) implement actual undo/redo 4) add Undo/Redo buttons