message: fix scrollpanel selector
diff: @@ -20,7 +20,7 @@ module.exports.scrollToTimelineTop = async function(session) {
  session.log.step(`scrolls to the top of the timeline`);
  await session.page.evaluate(() => {
  return Promise.resolve().then(async () => {
  - const timelineScrollView = document.querySelector(".mx_RoomView .gm-scroll-view");
  + const timelineScrollView = document.querySelector(".mx_RoomView_timeline .mx_ScrollPanel");
  let timedOut = false;
  let timeoutHandle = null;
  // set scrollTop to 0 in a loop and check every 50ms
  