Bug fix, resolve issue with Leave Room button not removing the room from the sidebar

app.js

@@ -200,6 +200,11 @@ function switchRoom(topic) {
 
 function leaveRoom() {
   if (currentRoom) {
+    const topic = b4a.toString(currentRoom.topic, 'hex');
+    const roomItem = document.querySelector(`li[data-topic="${topic}"]`);
+    if (roomItem) {
+      roomItem.remove();
+    }
     currentRoom.destroy();
     currentRoom = null;
   }