Add favorites to in editor asset lib

[HolonProduction]

When I start new projects (without finishing the previous one ™️), there are certain plugins that I import often e.g. prototype cubes. However there are multiple debug cube addons and some of them aren't as good as others. I often look at my other projects to find out which of them I preferred. A favorite button in the asset lib might help with this.

[Calinou]

Thanks for the proposal! Consolidating in #3521.