Log for action cancellation

[tsugumin]

As we could not track the situation user cancelled the process in the middle, we were struggling to find the root cause why all import action in the process did not run (Half of import action run and last part did not run).

It would be great if Cancellation is also included in History so that we can know the import action did not run due to user action.

[alexpavel]

Indeed it would be really useful. I just have a use-case about not launching all actions from a process.

Another reason that not all the actions are launched is that an action finishes is error.

It would be nice to be traced also the error messages of an action for the same reason: traceability. 

[Egor]

Agree, it can bring a lot of confusion if part of actions in the process have already been run