The Delete Job dialog box is for deleting one or more of the selected jobs.

Specify the number of seconds delay between the sending of SIGTERM and SIGKILL
to a running job by typing a valid value on the spinbox entry, or manipulating
the scrollbar arrows to increment through the valid values.  

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COMMAND BUTTONS
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This region of command buttons represents the final step when manipulating this
dialog box. 

Click on "delete" to proceed with job deletion.

Click on "cancel" to cancel job deletion and to quit out of this
dialog box. This is also the default action when the <Return> key is pressed.