Empty subject list in ACL is not handled well in UI

[Krock21]

1. Create a cypress node with ACL that has empty subject list(you can do it with CLI). For example:

   {
     "action": "allow",
     "subjects": [],
     "permissions": [
       "write"
     ],
     "inheritance_mode": "object_and_descendants"
   }
   

2. Try opening it in UI
3. See an error Unexpected behavior: item.subjects.length !== 1: ...

Same applies to Principal ACL