Formatting tweaks to Make and Model

I think #135 is a visual improvement. However, I've noticed the heat pump modes which are not in the database show up as black. This makes them stand out. I think it would be best if they would all be gray. 

<img width="1907" height="909" alt="Image" src="https://github.com/user-attachments/assets/8539c1e4-6095-4d92-9f86-889e42a091e0" />