Engaging Crowds: personalise the subject selection tool

[eatyourgreens]

Package
app-project

Is your feature request related to a problem? Please describe.
When I'm logged-in, the subject selection tool should show me which subjects I've already classified, in the Status column of the table.

Describe the solution you'd like
The subjects table should make authenticated API requests, client-side, to check user-seen status for each subject listed. Retired subjects can be skipped. Subjects have three possible states (I think):

1. Completely retired.
2. Classified by you but not retired yet.
3. Not retired and not yet classified by you.