Fix key error in tooltip

src/lib/utils.ts

@@ -69,6 +69,7 @@ export function timestampToDateTime(timestamp: number) {
   return str;
 }
 
+// Cheers :) https://overreacted.io/making-setinterval-declarative-with-react-hooks/
 export function useInterval(callback: Function, delay: number) {
   const savedCallback = useRef<Function>();
 

src/showplanner/index.tsx

@@ -490,10 +490,9 @@ const Showplanner: React.FC<{ timeslotId: number }> = function({ timeslotId }) {
                   .split("¬")
                   .map((t) => t.split(/:(.+)/))
                   .map((t) => (
-                    <>
+                    <div key={t[0]}>
                       <strong>{t[0]}:</strong> {t[1]}
-                      <hr />
+                    </div>
-                    </>
                   ))}
               </>
             )}