bug on ui-select multiple

[aibekmamatov]

Bug description:

when use multiple select like this:

<ui-select ng-model="selected_item_id" multiple="true">
  <ui-select-matches>{{$item.name}}</ui-select-matches>
  <ui-select-choices repeat='item.id as item in items'>{{item.name}}</ui-select-choices>
</ui-select>

it always select match of selected_item_id's last value
and on first initialise it select last item of repeated items

Link to minimally-working plunker that reproduces the issue: link

Version of Angular, UI-Select

Angular: 1.5.8

UI-Select: 0.19.1

[aibekmamatov]

It is because I use item._id as and track by item.id you can only use one orthe other.

Together they don't work, this is similar to `ngOptions.