This improves the look of the variable list when it's the debug panel is
docked on a side

### Before

![image](https://github.com/user-attachments/assets/6e886fc4-1579-4f4c-bda5-6850d080f34b)
### After

![image](https://github.com/user-attachments/assets/5c4528e5-aa01-4035-9f67-fdf22ce82e34)

Release Notes:

- N/A