message: Allow MELS to have its own RM
  This inserts a RM if any of the events in a MELS if the RM is tracking an event within it.
  Fixes
diff: @@ -282,15 +282,16 @@ module.exports = React.createClass({
  var isMembershipChange = (e) => e.getType() === 'm.room.member';
  for (i = 0; i < this.props.events.length; i++) {
  - var mxEv = this.props.events[i];
  - var wantTile = true;
  - var eventId = mxEv.getId();
  + let mxEv = this.props.events[i];
  + let wantTile = true;
  + let eventId = mxEv.getId();
  + let readMarkerInMels = false;
  if (!EventTile.haveTileForEvent(mxEv)) {
  wantTile = false;
  }
  - var last = (i == lastShownEventIndex);
  + let last = (i == lastShownEventIndex);
  // Wrap consecutive member events in a ListSummary, ignore if redacted
  if (isMembershipChange(mxEv) &&
  @@ -332,6 +333,9 @@ module.exports = React.createClass({
  let eventTiles = summarisedEvents.map(
  (e) => {
  + if (e.getId() === this.props.readMarkerEventId) {
  + readMarkerInMels = true;
  + }
  // In order to prevent DateSeparators from appearing in the expanded form
  // of MemberEventListSummary, render each member event as if the previous
  // one was itself. This way, the timestamp of the previous event === the
  @@ -356,6 +360,11 @@ module.exports = React.createClass({
  {eventTiles}
  </MemberEventListSummary>
  );
  +
  + if (readMarkerInMels) {
  + ret.push(this._getReadMarkerTile(visible));
  + }
  +
  continue;
  }
  