Notify track is not updated immediately when notifies are move to occupy same space

When the user moves two notifies onto the same frame, the notify track does not immediately update and add a second track so they don't merge together.

For it to update, the user has to perform a second action, such as reopen Persona or add another notify.

1. Open QAGame in editor.
2. Open an animation in Persona.
3. Add two notifies to the notify track
4. Right-click each notify and select Set Notify Frame: <AnyFrame> (just make sure it's the same for both notifies).

RESULT:

The notifies are on the same track.

EXPECTED:

To prevent overlap and making it look like there's one notify, a second track is created and a notify is moved there.

WORKAROUND:

Close and reopen the animation. Now there will be two notify tracks.