[D11] more wip on splitting frontend from in-game, "uitopbarcarouseldisplay" needs to be a separate scene again in order to be split off into a "global" group with a different lifetime to the frontend. Other components need similar treatment, doing one at a time. We seem to be using scene2prefab and then just using the scene anyway, rather than having a list of scene names we could have lists of UI prefabs to load, just need to do decide on one technique or the other rather than a bit of both, though there's some reason to believe scenes might load quicker than loading a prefab and instantiating it, will have to test both.