On pipelines list add a button to stop all jobs of certain pipeline.
Once a user clicks the button he will get a conformation dialog:
"Are you sure you want to stop all jobs of pipeline XXX?"
Once jobs are deleted user will get a message:
"XXX's Jobs have been stopped"
Or
"No running jobs of XXX to stop"
On pipelines list add a button to stop all jobs of certain pipeline. Once a user clicks the button he will get a conformation dialog: "Are you sure you want to stop all jobs of pipeline XXX?" Once jobs are deleted user will get a message: "XXX's Jobs have been stopped" Or "No running jobs of XXX to stop"