message: fix gate on tardis position
diff: @@ -3403,7 +3403,7 @@ export class MergeTree {
  tardisPositionFromClient(pos: number, fromSeq: number, toSeq: number, fromClientId: number,
  toClientId = NonCollabClient) {
  - if (fromSeq < toSeq && pos < this.getLength(fromSeq, fromClientId)) {
  + if (((fromSeq < toSeq)||(toClientId===this.collabWindow.clientId)) && pos < this.getLength(fromSeq, fromClientId)) {
  if ((toSeq <= this.collabWindow.currentSeq) && (fromSeq >= this.collabWindow.minSeq)) {
  let segoff = this.getContainingSegment(pos, fromSeq, fromClientId);
  let toPos = this.getOffset(segoff.segment, toSeq, toClientId);
  