Large number of reports attached to a threat board can break UI

[mpmmasterpeace]

Issue

When many (> 20?) reports are part of a threat board, then the url for the get can be too long and break the UI (loading spinner forever).

Fix

Remove feed that produces many/unhelpful reports
Reduce call from front end to only include 20 reports max.

Longer Term Fix

Will be handled in a future issue. Will link after creation.