Add description to integration activities

Hi :)

In DW9 we could add a description to an integration activity, which was good for documentation, instructions or warnings. It would be very useful to have that feature added and have the information displayed in the "Activity info" panel :)

<img width="2555" height="1040" alt="Image" src="https://github.com/user-attachments/assets/1fa204d5-83ed-4159-a9e5-4074772d5265" />

Br.
Lars