The view where one can click "Approve" should disable the button as long as the upstream promotion is not successful done.

Situation:

I have three promotions configured which should only happen in this order: Deploy to Staging (refered as A) -> QA OK (refered as B) -> Deploy to live (refered as C)
Obviously the QA should not be able to "mark" the build OK before it has been deployed.

The Promotions are configured with these upstream criterias:

• A: manual
• B: manual, when A is promoted
• C: manual, when B is promoted

Current:
B can be approved even if A has never been approved. Same for C vs. B or A.

Desired:
B's Approve should be disabled until A is successful approved. Same for C vs. B or A