Schedule manual pipeline jobs in advance
Description
It should be possible to trigger / schedule manual jobs within a pipeline before (all) preceding jobs completed.
People often know in advance they'd like to trigger a manual job before other build stages completed. These stages might take some time - now the person in charge has to wait for these jobs to complete and is only then able to trigger the manual job in the pipeline.
Proposal
There's a play button for a manual job within a pipeline - not the current "circle" which allows me to look at the job but not trigger it.
Basically, make it possible to trigger a job although all its dependencies haven't completed. If a dependency fails, the manual job will obviously not execute.