add a generic getKnownRooms

src/app/features/room/SmallWidgetDriver.ts

@@ -500,13 +500,11 @@ export class SmallWidgetDriver extends WidgetDriver {
      * client.
      * @returns The room IDs.
      */
-    /*
     public getKnownRooms(): string[] {
         return this.mxClient
-            .getVisibleRooms(SettingsStore.getValue("feature_dynamic_room_predecessors"))
+            .getVisibleRooms()
             .map((r) => r.roomId);
     }
-            */
 
     /**
      * Expresses a {@link MatrixError} as a JSON payload