Event descriptions fail to appear in Script Events panel when editing a NEW incident.

[jdalbey]

Steps to reproduce:
Start ScriptBuilder.
Create a new Incident. The Incident Editor window opens.
Click on "Telephone" and place at time 0:00. The event editor appears; close it.
Click on "CAD" and place at time 5:00. The event editor appears; close it.
The Incident Editor now has two events on the timeline.
Mouse over the timeline. Note that nothing is displayed in the Script Events panel.
Close the Incident Editor window.
Reopen the Incident Editor window for the same incident.
Mouse over the timeline. Observe the event descriptions correctly appear in the Script Events panel.

Comment: This is probably a low priority defect. If it takes a lot of work to fix it just ignore it for this milestone.