added placehodler in tracker

apps/dispatch/app/tracker/_components/ConnectedDispatcher.tsx

@@ -42,6 +42,9 @@ export const ConnectedDispatcher = () => {
 					</div>
 				</div>
 				<div className="collapse-content">
+					{!dispatcher?.length && (
+						<p className="text-center text-gray-500">Aktuell sind keine Disponenten verbunden</p>
+					)}
 					<ul className="list bg-base-100 rounded-box shadow-md">
 						{dispatcher?.map((d) => {
 							return (