[Feature] Make the categories more transparent

[TiagoExtreme199]

I checked the following before reporting a feature request

• I found no existing issue matching my feature request
• I have checked the theme options
• I use the latest version

Descripe the feature

Could the categories in the upper right corner of your Steam games be more transparent? Like, have an option to change the opacity or only highlight it when the mouse is over the box.

Anything else?