Geometry and mapmodel outline flickering in editor

To reproduce, select an entity and open entity menu with F6;
Geometry outline and mapmodel boxes are flickering during each update of the preview window;

(i believe this camera view in the UI below is causing it)
<img width="460" height="421" alt="Image" src="https://github.com/user-attachments/assets/88219cbe-fa01-4ffa-9a90-0872f856dccb" />
