feat(ui): Look for Room in the ring buffer from the newest instead of the oldest

feat(ui): Look for `Room` in the ring buffer from the newest instead of the oldest

crates/matrix-sdk-ui/src/room_list_service/mod.rs

@@ -313,7 +313,8 @@ impl RoomListService {
     pub async fn room(&self, room_id: &RoomId) -> Result<Room, Error> {
         {
             let rooms = self.rooms.read().await;
-            if let Some(room) = rooms.iter().find(|room| room.id() == room_id) {
+
+            if let Some(room) = rooms.iter().rfind(|room| room.id() == room_id) {
                 return Ok(room.clone());
             }
         }