Inconsistent link destination for assessors

[crablab]

When opening an IA link, sometimes the assessor will end up on the page for the assessment, and sometimes on the page listing all of their outstanding assessments.

Expected: if they only have one assessment outstanding, the link should take them directly to that assessment :)

This could be a race condition, or some kind of unexpected functionality (ie. we're counting total IAs for the assessor, not those outstanding)

[warrensearle]

This appears to be fixed by the work carried out in #34

[crablab]

Fixed :)