message: Add tooltip to Explore rooms button
diff: @@ -34,6 +34,7 @@ import SettingsStore from "../../settings/SettingsStore";
  import RoomListStore, { LISTS_UPDATE_EVENT } from "../../stores/room-list/RoomListStore2";
  import {Key} from "../../Keyboard";
  import IndicatorScrollbar from "../structures/IndicatorScrollbar";
  +import AccessibleTooltipButton from "../views/elements/AccessibleTooltipButton";
  // TODO: Rename on launch: https://github.com/vector-im/riot-web/issues/14367
  @@ -347,7 +348,7 @@ export default class LeftPanel2 extends React.Component<IProps, IState> {
  onVerticalArrow={this.onKeyDown}
  onEnter={this.onEnter}
  />
  - <AccessibleButton
  + <AccessibleTooltipButton
  className="mx_LeftPanel2_exploreButton"
  onClick={this.onExplore}
  title={_t("Explore rooms")}
  