Fix `<ControlLayer />` not accepting multiple children
Fix `<ControlLayer />` not accepting multiple children

Control layer previously assumed its only child would be a map. In practise it should be able to accept the map *and* additional controls

appearhere/bloom,appearhere/bloom,rdjpalmer/bloom,NGMarmaduke/bloom,appearhere/bloom,NGMarmaduke/bloom,rdjpalmer/bloom,rdjpalmer/bloom,NGMarmaduke/bloom