The property 'model' is ported to a bindable property.
The properties hasSelection, selection, selectedIndexes,
and currentIndex are left for later patches.
Task-number: QTBUG-85520
Change-Id: Ia424ce99fc80c3d807c634c21d161a3ad94b27d2
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>