(Feature) Give user information about crowdsale deployment status and provide the ability to resume

[fernandomg]

Due to the recent issues we were facing with the crowdsale deployment, I think that will be a good idea to add an informative list with each step and its status in stepFour

i.e.:

• safeMathLibrary
• token
• pricingStrategy
• crowdsale (... processing)
  • tier 1
  • tier 2 (... processing)
  • tier 3 (pending)
• crowdsaleAddress (pending)
• finalizeAgentABIArguments (pending)
• finalizeAgent (pending)

Also, add the ability to resume from where the process was halted.

Thus, if the user don't leave the screen or refresh it; he/she will be able to continue from where the deployment failed if for instance the Tx goes OOG, Metamask fails for any reason, and that kind of issues.

@igorbarinov @vbaranov l look forward to your comments.

[rstormsf]

@fernandomg I think using something like
https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage
might help to save session on the client

[igorbarinov]

Don't we have localStorage with MobX?

[fernandomg]

@rstormsf yes, it's really useful. I'll add it in a different stage, as it has to be thoroughly tested. To avoid persisting undesired information across sessions (maybe https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage is the best option for this phase).

@igorbarinov I don't think that persistence is part of the Mobx core.

[fernandomg]

This feature is already done, the part related to localStorage will be worked as part of #529