UX: add category logo option

[nolosb]

I use this component quite a lot and often need to show category logos. Opening this pr in case you want to add the feature to the main branch.

It adds a setting to show the logos, similar to the icons:

However, the default look right now is: Because by default another category header shows when a logo is available. I usually adjust the look with theme styles, but I guess it would need some optional, additional style declarations on the component if merged?