Couldn't see anything similar, feel free to merge if there is.
We have 20 or so groups to represent different sites / types of machine, containing 100+ machines. I don't want to mess with these groups, and a machine can only belong to one group. However, within the machines, there are 5 or so which I access on a daily basis. It would be really useful if I could have a 'favourites' or similar which would appear top of the list, and this contained only those I had marked as a 'show in favourites'.