Fix mistake while merge with master

portal/views/secure/dataset.py

@@ -12,7 +12,7 @@ from django.utils.translation import ugettext_lazy as _
 from django.views.generic import (CreateView, DeleteView, DetailView,
                                   TemplateView, UpdateView)
 
-from portal.forms import DataSetForm
+from portal.forms import DataSetForm, DataSetDisplayFieldsForm
 from portal.models import DataFile, DataSet, Lab, Profile, ShareGroup
 from portal.views import (ActivePageViewMixin, AjaxDatatableBackboneMixin,
                           CreateViewMixin, DeleteViewMixin, JSONListView,