First of all - thanks for the "possible next executions" widget - this was a really good idea.

But:
This widget also shows Job-Generators (see plugin https://wiki.jenkins-ci.org/display/JENKINS/Job+Generator+Plugin)
These jobs are listed in the next execution widget but they will never be executed by SCM-polls.

Please provide a filter like:

if(topLevelItem instanceof AbstractProject && !isGenerator(topLevelItem)){
...
}

where

private boolean isGenerator(TopLevelItem item){
   String gn = "org.jenkinsci.plugins.jobgenerator.JobGenerator";
   return project.getClass().getQualifiedName().equals(gn)
}

or something like that.