message: clear filter when switching spaces
diff: /*
  -Copyright 2020 The Matrix.org Foundation C.I.C.
  +Copyright 2020, 2021 The Matrix.org Foundation C.I.C.
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  @@ -26,6 +26,7 @@ import { Action } from "../../dispatcher/actions";
  import RoomListStore from "../../stores/room-list/RoomListStore";
  import { NameFilterCondition } from "../../stores/room-list/filters/NameFilterCondition";
  import {replaceableComponent} from "../../utils/replaceableComponent";
  +import SpaceStore, {UPDATE_SELECTED_SPACE} from "../../stores/SpaceStore";
  interface IProps {
  isMinimized: boolean;
  @@ -53,6 +54,8 @@ export default class RoomSearch extends React.PureComponent<IProps, IState> {
  };
  this.dispatcherRef = defaultDispatcher.register(this.onAction);
  + // clear filter when changing spaces, in future we may wish to maintain a filter per-space
  + SpaceStore.instance.on(UPDATE_SELECTED_SPACE, this.clearInput);
  }
  public componentDidUpdate(prevProps: Readonly<IProps>, prevState: Readonly<IState>): void {
  @@ -72,6 +75,7 @@ export default class RoomSearch extends React.PureComponent<IProps, IState> {
  public componentWillUnmount() {
  defaultDispatcher.unregister(this.dispatcherRef);
  + SpaceStore.instance.off(UPDATE_SELECTED_SPACE, this.clearInput);
  }
  private onAction = (payload: ActionPayload) => {
  