data-system]").forEach(ele=>{
			if (ele.dataset.system in session.pcs){
				if (ele.dataset.system !==UUID){
					multi = true;
				}
			} else { // delete, since no longer active.
				ele.remove();
			}
		});
		
		if (control==0){
			var obsControlButtonsBox = getById("obsControlButtons").querySelector("[data-system='"+UUID+"']");
			if (obsControlButtonsBox){
				obsControlButtonsBox.remove();
			}
			var obsSceneNamesBox = getById("obsSceneNames").querySelector("[data-system='"+UUID+"']")