message: Fix for createBriefcase
diff: @@ -487,8 +487,6 @@ export class BriefcaseManager {
  const iModel: HubIModel = (await BriefcaseManager.hubClient!.IModels().get(accessToken, projectId, new IModelQuery().byId(iModelId)))[0];
  const briefcase = new BriefcaseEntry();
  - briefcase.changeSetId = "";
  - briefcase.changeSetIndex = 0;
  briefcase.iModelId = iModelId;
  briefcase.isOpen = false;
  briefcase.openMode = openMode;
  @@ -499,12 +497,16 @@ export class BriefcaseManager {
  downloadToPathname = BriefcaseManager.buildReadOnlyPath(iModelId, iModel.name!);
  briefcase.briefcaseId = BriefcaseId.Standalone;
  await BriefcaseManager.downloadSeedFile(accessToken, iModelId, downloadToPathname);
  + briefcase.changeSetId = "";
  + briefcase.changeSetIndex = 0;
  } else {
  const hubBriefcase: HubBriefcase = await BriefcaseManager.acquireBriefcase(accessToken, iModelId);
  downloadToPathname = BriefcaseManager.buildReadWritePath(iModelId, +hubBriefcase.briefcaseId!, iModel.name!);
  briefcase.briefcaseId = hubBriefcase.briefcaseId!;
  briefcase.fileId = hubBriefcase.fileId;
  await BriefcaseManager.downloadBriefcase(hubBriefcase, downloadToPathname);
  + briefcase.changeSetId = hubBriefcase.mergedChangeSetId!;
  + briefcase.changeSetIndex = await BriefcaseManager.getChangeSetIndexFromId(accessToken, iModelId, briefcase.changeSetId);
  }
  briefcase.pathname = downloadToPathname;
  