Enable watching on nested ng-repeats.

[stereosteve]

For the case when you have two nested ng-repeats: an outer one for optgroup and an inner repeat for the options.

For example:

// using underscore's groupBy function
$scope.groupedCities = _.groupBy(cities, 'state')

<select ui-select2 multiple>

  <optgroup
    ng-repeat="(state, cities) in groupedCities"
    label="{{ state }}">

    <option
      ng-repeat="city in cities"
      ng-value="city.name">
      {{ city.name }}
    </option>

  </optgroup>

</select>

The current implementation only looks for ng-repeat on an option element - in this case it causes a scoping issue, because cities is only defined inside of the parent ng-repeat. As a result the initial value would not be set correctly.

This change caused an error to sometimes be thrown on this line:

// Set initial value - I'm not sure about this but it seems to need to be there
elm.select2('data', controller.$modelValue);

Removing it fixed the problem - all the tests pass and everything worked correctly, but I didn't figure out why.

I can add a test for nested ng-repeat just wanted to get some feedback first...

[just-boris]

It seems to build failed with not related to the pull request error. Someone from @angular-ui can restart the build again.
@stereosteve you also can do it, by pushing this changes again using:

git commit --amend
git push -f origin nested_items

I'd like this pull request, so I want to see this changes are merged sooner
It seems to build failed with not related to the pull request error. Someone from @angular-ui can restart the build again.
@stereosteve you also can do it, by pushing this changes again using:

git commit --amend
git push -f origin nested_items

I'd like this pull request, so I want to see it merged