Only call confirmRefresh() on time, on date range change

Previously, when changing the date range, we had several modals that opened.
Now, the `confirmRefresh()` method should be open only one time.

Update specs as well:
 - use the method `accept_confirm`
 - Removing pending and sleep as the spec is now green

app/assets/javascripts/admin/line_items/controllers/line_items_controller.js.coffee

@@ -38,6 +38,8 @@ angular.module("admin.lineItems").controller 'LineItemsCtrl', ($scope, $timeout,
 
     return unless moment($scope.formattedStartDate).isValid() and moment($scope.formattedEndDate).isValid()
 
+    return unless $scope.confirmRefresh()
+
     $scope.loadOrders()
     $scope.loadLineItems()