Use canonical alias in buflist when possible

src/buffers/room.rs

@@ -288,7 +288,14 @@ impl RoomBuffer {
 #[async_trait]
 impl Buffer for RoomBuffer {
   fn short_name(&self) -> String {
-    self.room_id.as_str().to_owned()
+    self
+      .buffers
+      .iter()
+      .flat_map(|buf| buf.client.get_room(&self.room_id))
+      .flat_map(|room| room.canonical_alias()) // TODO: .display_name() is better, but async :(
+      .map(|alias| alias.as_str().to_owned())
+      .next()
+      .unwrap_or(self.room_id.as_str().to_owned())
   }
 
   fn room_id(&self) -> Option<&RoomId> {