under incidents, attributed threat actors are not showing up

[mattcoarr]

A row shows up for an indcident's attributed threat actors, but the details cell is blank (it should be an expandable link).

Data looks like this:

<stix:Incident xsi:type="incident:IncidentType" id="incident123">
  <incident:Title>my first incident</incident:Title>
  ...
  <incident:Attributed_Threat_Actors>
    <incident:Threat_Actor>
      <stixCommon:Threat_Actor idref="threatActor456" />
    </incident:Threat_Actor>
  </incident:Attributed_Threat_Actors>
</stix:incident>

[mattcoarr]

fixed in 82f4e0cf1dd657454b12cf14fcacd62a2e59d3df