StickerPicker: update when accountdata is updated (#10945)

* StickerPicker: update when accountdata is updated

This was incorrectly listening for in-room account data; in fact `m.widgets` is
global account data.

Fixes some flaky cypress tests.

* another ref

src/components/views/rooms/Stickerpicker.tsx

@@ -15,9 +15,10 @@ limitations under the License.
 */
 
 import React from "react";
-import { Room, RoomEvent } from "matrix-js-sdk/src/models/room";
+import { Room } from "matrix-js-sdk/src/models/room";
 import { logger } from "matrix-js-sdk/src/logger";
 import { IWidget } from "matrix-widget-api";
+import { ClientEvent } from "matrix-js-sdk/src/client";
 
 import { _t, _td } from "../../../languageHandler";
 import AppTile from "../elements/AppTile";
@@ -138,7 +139,7 @@ export default class Stickerpicker extends React.PureComponent<IProps, IState> {
         this.dispatcherRef = dis.register(this.onAction);
 
         // Track updates to widget state in account data
-        MatrixClientPeg.get().on(RoomEvent.AccountData, this.updateWidget);
+        MatrixClientPeg.get().on(ClientEvent.AccountData, this.updateWidget);
 
         RightPanelStore.instance.on(UPDATE_EVENT, this.onRightPanelStoreUpdate);
         // Initialise widget state from current account data
@@ -147,7 +148,7 @@ export default class Stickerpicker extends React.PureComponent<IProps, IState> {
 
     public componentWillUnmount(): void {
         const client = MatrixClientPeg.get();
-        if (client) client.removeListener(RoomEvent.AccountData, this.updateWidget);
+        if (client) client.removeListener(ClientEvent.AccountData, this.updateWidget);
         RightPanelStore.instance.off(UPDATE_EVENT, this.onRightPanelStoreUpdate);
         window.removeEventListener("resize", this.onResize);
         if (this.dispatcherRef) {