Feature request: Time estimates

[graham73may]

Hi,

Really love this plugin, the only thing that stood out to me about the admin interface was it didn't have any time estimate for how long the process may take (it's a feature I guess I'm used to from other large batch tasks like Relevanssi's indexer). How else do I know how many cups of coffee I have time to go and make? :D

e.g.

Thanks!