Fix redirect for show_defaults when not IFC model present

modules/ifc_models/app/controllers/ifc_models/ifc_models_controller.rb

@@ -61,10 +61,11 @@ module ::IFCModels
 
     def show_defaults
       if @ifc_models.empty?
-        redirect_to "index"
+        redirect_to action: :index
       end
 
       @default_ifc_models = @project.ifc_models.defaults
+      provision_gon(@default_ifc_models)
     end
 
     def create