Add ability to poll per change when Jenkinsfile includes a checkout with poll per change ('filter: [ incremental(true) ]'). For example:
                checkout perforce(credential: 'myCredential',
                         filter: [ incremental(true) ],
                         populate: forceClean(have: true,
                                 parallel:
                                        [
                                         enable: false,
                                         minbytes: '1024',
 

At the moment when the pipeline polls it will build all changelists within the view since last poll.