message: Tweak sent marker code style
diff: @@ -614,11 +614,13 @@ export default class MessagePanel extends React.Component {
  // This is a bit nuanced, but if our next event is hidden but a future event is not
  // hidden then we're not the last successful.
  - if (nextEventWithTile) { // avoid length limit by wrapping in an if
  - if (isSentState(nextEventWithTile.getAssociatedStatus()) && nextEventWithTile !== nextEvent) {
  + if (
  + nextEventWithTile &&
  + nextEventWithTile !== nextEvent &&
  + isSentState(nextEventWithTile.getAssociatedStatus())
  + ) {
  isLastSuccessful = false;
  }
  - }
  // We only want to consider "last successful" if the event is sent by us, otherwise of course
  // it's successful: we received it.
  