BHV-11591 Include removed indices to return object for ModelList remove.
Instead of using stateful property, return removed indices too in ModelList

Enyo-DCO-1.1-Signed-off-by: David Um david.um@lge.com
Merge branch 'BHV-11591-davidum' of https://github.com/enyojs/enyo into BHV-11591-davidum

Conflicts:
	source/data/Collection.js
	source/data/ModelList.js