message: fix double local insert in rand test; add update colors
diff: @@ -188,6 +188,12 @@ function renderTree(div: HTMLDivElement, pos: number, client: SharedString.Clien
  span.pos = segOffset;
  segOffset = 0;
  }
  + if ((textSegment.clientId == 0)&&(textSegment.seq>0)) {
  + span.style.backgroundColor = "lightskyblue";
  + }
  + else if ((textSegment.clientId == 1)&&(textSegment.seq>0)) {
  + span.style.backgroundColor = "pink";
  + }
  innerDiv.appendChild(span);
  return segText;
  }
  @@ -544,7 +550,6 @@ class StringView {
  let removeStart = word1.pos;
  let removeEnd = removeStart + word1.text.length;
  this.sharedString.removeText(removeStart,removeEnd);
  - client.removeSegmentLocal(removeStart, removeEnd);
  let word2 = SharedString.findRandomWord(client.mergeTree, client.getClientId());
  while (!word2) {
  word2 = SharedString.findRandomWord(client.mergeTree, client.getClientId());
  