Admins can see more buttons in Reviewable Sessions than actions that are available
Coming from #203 (closed), for example as an admin listing the Reviewable Sessions on https://scriptum.apps.ecobytes.net/en/malmo2018/cfp/events/reviewable, I am presented not only with workable buttons, i.e. Reserve for Review, but also with the others. Yet these only work after a submission has been reserved by oneself.
We propose not to work with an admin user on the platform for day to day use, but rather use a less priviledged
crew user, also for verification of the authentication and permissions scheme.