Sighting details are empty in investigation graphs

[Archidoit]

Description

Sighting details are empty in investigation graphs.
Same for ref relationships

Environment

1. OS (where OpenCTI server runs): { e.g. Mac OS 10, Windows 10, Ubuntu 16.4, etc. }
2. OpenCTI version: { e.g. OpenCTI 1.0.2 }
3. OpenCTI client: { e.g. frontend or python }
4. Other environment details:

Reproducible Steps

Steps to create the smallest reproducible scenario:

• Go to an investigation graph.
• Click on a sighting relationship (arrow).
• The preview window is empty.

Expected output

Display the sighting details, like it is done for other relationships.

Other bugs resolved in this issue

• In an investigation graph, click on a ref (label/making etc), then click on the edit button in the toolbar, an error occurs.
• same when trying to edit a sighting
  Comment: to see refs objects in such graph, you can follow these steps:
  add an entity that has refs in an investigation graph, click on the entity, click on the 'expand' button of the toolbar