minor edits to style and code-base
[stop-gap-fix]: Reload exam/summary so that pagination links are available as needed

Problem: For large class sizes, we need pagination. But loading results for an individual
results means that the pagination links are irrevocably lost

The easy fix is to reload exam/summary.
However, this query is slow

Possible fixes:
  1. make the query fast
  2. remember paginator's state for each tab