Issue:

When a user has full job permissions(build, create, promote....) on Jenkins but not Overall Admin access, they can not manually promote a job using the button.

Steps to reproduce:

1. Spawn up a new Jenkins instance with 2 users: Admin(full admin permissions), Developer(full job permissions and overall read) and the promoted builds plugin installed
2. Create a new job with a manual promotion process having no "Approvers" list
3. Build the Job
4. Observe that Admin can promote the build but Developer does not have access to the button to promote

Workaround:

Adding the Developer user to the list of approvers makes the button show up

Expected Behavior:

I would expect the Developer user to also have access to the promotion process since they have job promote permission

Let me know if I can clarify anything