Add load group ( load order ) to the job details screen and allow it as a sort column

[RADSr]

I've got a schema with load order defined into a bunch of groups.

It would be helpful to see the tables in run order ( group order ) so I can identify where in my process the load fails and run individual tables from there   <<< bonus if I could run groups from the UI  

[JoeM]

Adding @mhelmy to review.