Engine auto deletion time goes to negative value

[viggates]

Engine auto deletion time goes to negative value if a run triggered towards the end of deletion time.

Steps to reproduce

1. Launch a collection
2. Click on Details section to know the auto deletion time (15 or 30 minutes)
3. Wait until 1 minute before deletion time
4. Trigger the collection
5. Stop the collection but do not purge
6. Check on Details section again, value should go to negative value past 0 minutes

Possibilities

It could due to a diff between UI side and the GC kick in interval.
Because GC runs every 1 minute or so.
So in the UI, if it happens got passed deletion time, it may start to show negative values.

[iandyh]

I think the simplest solution will be disabling negative value at the UI side.