message: Let pointer events fall through to scroll button
  This makes it easier to click the entire visible area of the scroll button,
  including the green circle at the top.
diff: @@ -32,9 +32,9 @@ limitations under the License.
  width: 4px;
  height: 4px;
  border-radius: 16px;
  - overflow: hidden;
  background-color: $secondary-accent-color;
  border: 6px solid $accent-color;
  + pointer-events: none;
  }
  .mx_TopUnreadMessagesBar_scrollUp {
  