Describe the bug

Problem: whenever we have the theme set to os, if the system is set to dark we get the wrong image for the What's new popup.
I can see in the background how the theme is changed from dark to os - not sure if the issue is on how the theme value is set (do we expect an os value there? or according to the os theme, then we set this to dark or `light?), or on the operator for choosing the image.

Expected behavior

No response

Screenshots/Recordings

Steps to reproduce

1. It seems the default value for theme is os, so change your os theme to dark
2. Open MetaMask
3. See the image is the one for the light theme

Error messages or log output

No response

Version

11.9.0

Build type

None

Browser

Chrome

Operating system

Linux

Hardware wallet

No response

Additional context

No response

Severity

No response