Fixed API activate bug when annotations share start time

[jackpope]

When using the API to activate an annotation that shares a start time, the wrong annotation may end up opening.

Steps to reproduce:

• Create two annotations, one with range, one without, at the same start time.
• Use the API to activate the ranged annotation

Result:

• The ranged annotation opens and then setLiveAnnotation() fires, opening the non-ranged annotation

Expected result:

• The ranged annotation opens and stays opened