update array helper to use .slice to make new array
update array helper to use .slice to make new array

dafortin/ember-frost-core,ciena-frost/ember-frost-core,EWhite613/ember-frost-core,EWhite613/ember-frost-core,dafortin/ember-frost-core,dafortin/ember-frost-core,EWhite613/ember-frost-core,ciena-frost/ember-frost-core,ciena-frost/ember-frost-core