Relationship delete button is missing in project details

[elenaustyugova]

In the case when the project is in the active event, the delete relationship button must be on the details page, but it must be inaccessible for clicking

Steps to reproduce:

1. Run an event with a project that has a relationship
2. Go to project details

Actual result: In the block "Relation" there are no delete buttons for relations

Expected result: Buttons of delete relations are present and not accessible for clicking

Req ID: REQF_adm_proj-001, REQF_adm_proj-009