Delete form data from session store on completion of onboarding

[damianmoore]

Form data is stored in the session so that the user can go backwards and forwards in the onboarding flow without having to re-enter their data. This data continues to live in the browser which can confuse things when a users has cleared their database and are trying to start a fresh installation. Also, it contains things like username and password.

[GyanP]

Basically, we are using little-state-machine to keep each onboarding form data. So that if user partially completed onboarding steps and left. Then whenever user wants to complete his signup(onboarding) process he could start form feeling from where he previously left. Basically little-state-machine stores the data in session storage. And I have tried many different ways to reset the state machine by using action but I was getting issues to do it. So In last I have clear the session storage when user done last step of onboarding.

I have pushed it's changes on branch 287-delete-from-data

[damianmoore]

Thanks @GyanP. This is now merged into master as of e75242c.