Manual Jobs are not showing on the jobs/trigger screen

[ghost]

When setting up a Manual only job, the job doesn't show up in the front-end. This issue is replicable with the two examples as part of this solution. If the job doesn't use some sort of schedule, it won't show up. Even if I use .WithSimpleSchedule() when adding the trigger manually in the Program.cs class the job won't show up. In order to have the job show up I need a Cron expression attached the trigger but I need this job to be manual only.