[Pharo-project] [update 1.2] #12333

[Stéphane Ducasse]

- Issue 3682:   multiple undo/redo is broken in 1.2 because of Ocompletion. 
Part two. Thanks Alain Plantec.
- Issue 3660:   Revert incorrect Monticello branch naming support. Thanks 
lukas, julian and dale.

Stef