public void GetGroups(ComboBox comboBox)
        {
            comboBox.Items.Clear();
            var groups = credentialsRepository.GetGroups(credentials =>
                                                         (credentials.ActorType == (int)ActorType.User && credentials.ActorId == Initializer.LoggedInUser.Id) ||
                                                         (credentials.ActorType == (int)ActorType.Group && Initializer.LoggedInUser.Groups.Any(group => group.Id == credentials.ActorId)));

            comboBox.Items.Add(Lng.Elem("All"));
            foreach (var group in groups)
            {
                comboBox.Items.Add(group);
            }
        }