Additional initializeSelection methodicde

Changes:

* Change uses of initializeSelection to selectItem
* Use "choose" event to respond to deliberate item selection by the user

Depends on changes in OOJS-UI (Ib3826ed)

Change-Id: Ia167a70ca5f40b1f15adad30620fdb13ef0d02d7
Merge "Additional initializeSelection methodicde"