better ETC for finished workflows (#3804)
better ETC for finished workflows (#3804)

* report 0 days for finished workflows

don't calc and eta for complete workflows, just report 0

* extract calculation to parent component function

leave the functional component to just render the passed in data from the parent.

* use correct param naming

props are passed to components and they have attributes

amyrebecca/Panoptes-Front-End,amyrebecca/Panoptes-Front-End,jelliotartz/Panoptes-Front-End,zooniverse/Panoptes-Front-End,jelliotartz/Panoptes-Front-End,jelliotartz/Panoptes-Front-End,amyrebecca/Panoptes-Front-End