Unnecessary Scrollbars on build with parameters screen when using Active Choices Plugin

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.