Export the matrix client from the store

src/stores/room-list/RoomListStore2.ts

@@ -78,6 +78,10 @@ export class RoomListStore2 extends AsyncStoreWithClient<ActionPayload> {
         return this.algorithm.getOrderedRooms();
     }
 
+    public get matrixClient(): MatrixClient {
+        return super.matrixClient;
+    }
+
     // Intended for test usage
     public async resetStore() {
         await this.reset();