Adding an Active Choices Reactive Parameter with choice type of radio buttons or check boxes produces unnecessary scrollbars on the [build with parameters] screen (see attached image). Jenkins url is: https:// [ci_url] /job/ [job_name] /build?delay=0sec
Height calculation in the Javascript function of checkboxContent.jelly and radioContent.jelly seems to create a height value which is too small.

I have created a push request on GitHub with my own solution, should you choose to accept it.