Improve admin page snapshot rendering
Improve admin page snapshot rendering

Summary:
Link to the snapshot info page with the snapshot id; don't give the option
to active or deactivate if the snapshot failed.

Screenshot:{F273025}

Test Plan: Manual

Reviewers: haoyi, paulruan

Reviewed By: paulruan

Subscribers: changesbot

Differential Revision: https://tails.corp.dropbox.com/D154665

dropbox/changes,dropbox/changes,dropbox/changes,dropbox/changes