botbuilder-community-dotnet: FormFlow State doesn't properly reset on FormCanceledException

This stems from @paul198204’s (@EricDahlvang: this is Praveen) issue where basically:

1. User starts FormFlow Dialog
2. User says “quit” and bot cancels all dialogs
3. User attempts to restart FormFlow Dialog, but instead continues where they left off

Not being familiar with FormFlow, I’m posting this here for additional help.

My guess is that the else clause from here should call _formState.Reset():

            catch (Exception inner)
            {
                if (!(inner is FormCanceledException<T>))
                {
                    throw new FormCanceledException<T>(inner.Message, inner)
                    {
                        LastForm = _state,
                        Last = _form.Steps[_formState.Step].Name,
                        Completed = (from step in _form.Steps
                                     where _formState.Phase(_form.StepIndex(step)) == StepPhase.Completed
                                     select step.Name).ToArray()
                    };
                }
				// HERE
                else
                {
                    throw;
                }
            }
        }

I also considered recommending that the user call Reset() manually since it’s public in FormState. However, they’d like to call it from outside of FormDialog but FormDialog has _formState private.

There’s likely a way to do this, but again, I’m not very familiar with FormFlow.