Update GuestDeviceController to only display network devices on the list view

Author: skovic

app/controllers/guest_device_controller.rb

@@ -35,4 +35,9 @@ def set_session_data
     session[:layout] = @layout
     session[:guest_device_lastaction] = @lastaction
   end
+
+  def show_list
+    options = {:model => "GuestDevice", :named_scope => [:with_ethernet_type]}
+    process_show_list(options)
+  end
 end