Description of problem:
Nothing in the UI hints that there are extended cronline expressions available for scheduling rex jobs. This way, the new capability could go unnoticed

Version-Release number of selected component (if applicable):
Satellite 6.14

Suggestions:
1. The Cronline dropdown option option for setting recurrence could be reneamed to "Cronline (extended)" or something similar.
2. The help pop-up for the cronline field could include some of the fugit expressions for awareness