Feature Request: Allow tabs of collections

[Trikzon]

Right now, you can have a tab that shows all the games, soundtracks, software, or hidden that match certain filters next to each other.

However, there's no way to make a custom "Collections tab" like the default Collections tab that SteamOS gives you.

I'd like to be able to make a tab that has only certain collections, instead of all of them. For example, I want to have a tab that contains all my emulated console collections. So it would show my GameBoy, NES, Nintendo DS, Super Nintendo, etc. collections, but only the ones that I choose.

Here's an image of collections from the default Collection tab: