Room header UI updates (#11507)

* Fix performance issues with useRoomMembers

With the current implementation it would create a new function, with leading: true, rendering the whole throttling useless

* Add public room indicator

* Format room members count better

* Add public room test

* Add search to room summary card

* Update settings UI

* Update snapshot

* Remove default title attribute

src/settings/Settings.tsx

@@ -548,6 +548,7 @@ export const SETTINGS: { [setting: string]: ISetting } = {
         isFeature: true,
         labsGroup: LabGroup.Rooms,
         displayName: _td("labs|new_room_decoration_ui"),
+        description: _td("labs|under_active_development"),
         supportedLevels: LEVELS_FEATURE,
         default: false,
         controller: new ReloadOnChangeController(),