message: Hide Jump to Read Receipt button for users who have not yet sent an RR
diff: @@ -369,11 +369,14 @@ const UserOptionsSection: React.FC<{
  });
  };
  + const room = cli.getRoom(member.roomId);
  + if (room && room.getEventReadUpTo(member.userId)) {
  readReceiptButton = (
  <AccessibleButton onClick={onReadReceiptButton} className="mx_UserInfo_field">
  { _t('Jump to read receipt') }
  </AccessibleButton>
  );
  + }
  insertPillButton = (
  <AccessibleButton onClick={onInsertPillButton} className={"mx_UserInfo_field"}>
  