More posthog tracking around joining rooms and room search (#7807)

src/components/structures/SpaceRoomView.tsx

@@ -867,7 +867,7 @@ export default class SpaceRoomView extends React.PureComponent<IProps, IState> {
             defaultDispatcher.dispatch<ViewRoomPayload>({
                 action: Action.ViewRoom,
                 room_id: this.state.firstRoomId,
-                _trigger: undefined, // other
+                metricsTrigger: undefined, // other
             });
             return;
         }