Use room alias in generated permalink for rooms

Signed-off-by: Simon Merrick <s.m3rrick@gmail.com>

src/utils/permalinks/Permalinks.js

@@ -130,7 +130,13 @@ export class RoomPermalinkCreator {
     }
 
     forRoom() {
-        return getPermalinkConstructor().forRoom(this._roomId, this._serverCandidates);
+        try {
+            // Prefer to use canonical alias for permalink if possible
+            const alias = this._room.getCanonicalAlias();
+            return getPermalinkConstructor().forRoom(alias, this._serverCandidates);
+        } catch (error) {
+            return getPermalinkConstructor().forRoom(this._roomId, this._serverCandidates);
+        }
     }
 
     onRoomState(event) {