message: In practice the MELS-1,2,3 solves nothing, revert it
diff: @@ -237,7 +237,6 @@ module.exports = React.createClass({
  this.eventNodes = {};
  var i;
  - let melsIndex = 0;
  // first figure out which is the last event in the list which we're
  // actually going to show; this allows us to behave slightly
  @@ -303,10 +302,10 @@ module.exports = React.createClass({
  // instead will allow new props to be provided. In turn, the shouldComponentUpdate
  // method on MELS can be used to prevent unnecessary renderings.
  //
  - // melsIndex is deliberately unrelated to the contained events so that pagination
  - // will not cause it to be recreated.
  - const key = "membereventlistsummary-" + melsIndex;
  - melsIndex++;
  + // Whilst back-paginating with a MELS at the top of the panel, prevEvent will be null,
  + // so use the key "membereventlistsummary-initial". Otherwise, use the ID of the first
  + // membership event, which will not change during forward pagination.
  + const key = "membereventlistsummary-" + (prevEvent ? mxEv.getId() : "initial");
  if (this._wantsDateSeparator(prevEvent, mxEv.getDate())) {
  let dateSeparator = <li key={ts1+'~'}><DateSeparator key={ts1+'~'} ts={ts1}/></li>;
  