Favouriting a roster#139

If a player can favourite a roster they like, they can find that roster again easily if they have a lot of rosters and maybe prevent accidentally deleting it by using a colour code or a flag icon.

This is something I’ dlike to see, it might be planned. Poking @Nick for thoughts

We had planned this for a long time (ala Legends of Runeterra), but I think we are still working on it.