Update model on sort (fixes #974)

Author: homerjam

src/uiSelectSortDirective.js

@@ -1,12 +1,15 @@
 // Make multiple matches sortable
 uis.directive('uiSelectSort', ['$timeout', 'uiSelectConfig', 'uiSelectMinErr', function($timeout, uiSelectConfig, uiSelectMinErr) {
   return {
-    require: '^uiSelect',
-    link: function(scope, element, attrs, $select) {
+    require: ['^uiSelect', '^ngModel'],
+    link: function(scope, element, attrs, ctrls) {
       if (scope[attrs.uiSelectSort] === null) {
         throw uiSelectMinErr('sort', "Expected a list to sort");
       }
 
+      var $select = ctrls[0];
+      var $ngModel = ctrls[1];
+
       var options = angular.extend({
           axis: 'horizontal'
         },
@@ -93,6 +96,8 @@ uis.directive('uiSelectSort', ['$timeout', 'uiSelectConfig', 'uiSelectMinErr', f
 
         move.apply(theList, [droppedItemIndex, newIndex]);
 
+        $ngModel.$setViewValue(Date.now());
+
         scope.$apply(function() {
           scope.$emit('uiSelectSort:change', {
             array: theList,