Missing signals in Signal mapping.

Steps to reproduce:

1. Import the attached gsdml

2. Add an nt50 - PROFIBUS slave and PROFINET Controller

3. Add the KP8 device (from the imported gsdml) to the controller line.

4. KP8 has one module with 2 inputs and 4 outputs.

5. Open the gateway mapping page

Current : there are 2 inputs and 2 outputs - 2 outputs are missing

Expected : there are 2 inputs and 4 outputs