Option to delete old jobs

[ppcololo]

I have a lot of Jobs in the UI and it will be nice to have an option to hide or delete old jobs.
For example:
I'm testing a new job by POST request and during this test I could create 10-15 jobs which failed or canceled by me. And I can't delete them from web UI

And regarding last changes about job logs will be nice if with deleting Job - all related logs also will be deleted

[gaby]

This should be optional, cause it could be used by someone to run jobs and then delete the logs removing the audit trail

[runabol]

A good middle ground might be an archiving/soft-delete feature, where the job is marked as archived and does not appear in search results by default unless "include archived jobs" or something like that is checked off.