title: Enable permanently disabled project in Jenkins
body: <p>In Jenkins, there is a Pull Request project which turns to disabled mode once it has been merged to the master. The behavior is correct, except that project is permanently disabled and I cannot enable it once again to remove it from the dashboard. The disabled/enabled option is greyed out. Cannot also remove the build and the pull request, still receives the error messages. Attached screenshots for verification.</p>
  <p>Removed also content from the workspace.</p>
  <p><a href="https://i.stack.imgur.com/VVVaD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VVVaD.png" alt="PR disabled" /></a></p>
  <p><a href="https://i.stack.imgur.com/Z2hg3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Z2hg3.png" alt="Remove of the build - error" /></a></p>
  <p><a href="https://i.stack.imgur.com/iaMzR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iaMzR.png" alt="Disable option" /></a></p>