Also rescale default GitHub icons

[BlockyTheDev]

Is your feature request related to a problem? Please describe.
Also rescale default GitHub icons like the submodule icon, which is also not replaced by the extension on the repository main overview (Example: https://github.com/mallowigi/a-file-icon-web) in the code search beta sidebar it is replaced. See screenshots. When i look into the Web-Devtools the size looks around the same (Extension icons are set to 16x and the Github defualt icon is 16x14 in this case but it looks much bigger.)

Describe the solution you'd like
Also rescale the icon and also replace the icon.

Describe alternatives you've considered
/

Additional context
INFO: I am in the https://github.com/features/code-search beta.