HourGlass undo history flaw and a planned solution

Currently it works like this : noshared_state

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

So, each undo history step stores each envelope regardless of the envelope containing the same data or not…Hopefully I can in the near future improve it by introducing sharing of state data :

shared_state

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