switched to lodash sort

Author: tladendo

app/directives/challenge-user-place/challenge-user-place.directive.js

@@ -48,11 +48,8 @@
             $scope.challenge.userDetails.submissions = $scope.challenge.userDetails.submissions.filter(function(submission) {
               return submission && submission.submissionImage;
             });
-            $scope.challenge.userDetails.submissions.sort(function(left, right) {
-              if (!left.placement && !right.placement) return 0;
-              if (!right.placement) return -1;
-              if (!left.placement) return 1;
-              return left.placement - right.placement;
+            $scope.challenge.userDetails.submissions = _.sortBy($scope.challenge.userDetails.submissions, function(submission) {
+              return submission.placement;
             });
           }
           if (!$scope.challenge.isPrivate && $scope.challenge.userDetails && $scope.challenge.userDetails.submissions && $scope.challenge.userDetails.submissions.length > 0) {