Steps to reproduce:
1. Add a scheduled event
2. Use "Actions" -> "Edit scheduled events" to change the start date to be in the past (this is currently possible due to another bug)
4. Try to use "Actions" -> "Edit scheduled events" again
Actual Results: Table shows status "Scheduled" but warning message says the event cannot be edited because it is not scheduled.
Expected Results: Warning message is not shown
A similar problem exists for "Action" -> "Start Task"