Duplicate a job definition

[JasonWeill]

Problem

Users cannot easily create job definition B as a copy of job definition A.

Proposed Solution

Provide an option in the list or detail view to duplicate job definition A, creating job definition B.

Alternatively, on the edit form while editing job definition A, add a "save as" option, to create a new job definition B. Job definition A would be unmodified as a result.

Additional context